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Vampire Bats Biting People | National Geographic

Video vocabulary

day

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US / deɪ /

UK / de /

A1
  • noun
  • A period of 24 hours beginning at midnight
  • The period of time when it is light outside
  • Person's name

explain

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US / ɪk'spleɪn /

UK / ɪkˈsplen /

A1
  • verb
  • To make clear or easy to understand by describing

persist

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US / pə'sɪst /

UK / pɚˈsɪst, -ˈzɪst /

B1
  • verb
  • To continue a course of action despite opposition

paralytic

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US / ˌpærəˈlɪtɪk /

UK / ˌpærəˈlɪtɪk /

B1
  • adjecitve
  • Concerning the loss of ability to use muscles

valley

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US / 'vælɪ /

UK / ˈvæli /

A2
  • noun
  • Area between mountains with river running through

starvation

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US / stɑ:ˈveɪʃn /

UK / stɑ:rˈveɪʃn /

B1
  • noun
  • Extreme hunger; death from lack of food

continue

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US / kən'tɪnju: /

UK / kənˈtɪnju /

A1
  • verb
  • To do something without stopping, or after pausing
  • To start doing again after a break, pause, or stop

ecological

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US / ˌi:kəˈlɒdʒɪkl /

UK / ˌi:kəˈlɑ:dʒɪkl /

B1
  • adjecitve
  • Concerning the environment, plants, or animals

actually

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US / ˈæktʃuəli /

UK / ˈæktʃuəli /

A1
  • adverb
  • Used to add new (often different) information

attack

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US / ə'tæk /

UK / əˈtæk /

A2
  • noun
  • Act intended to hurt someone physically, mentally
  • verb
  • To try to destroy, beat, or injure

domestic

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US / dəˈmestɪk /

UK / dəˈmɛstɪk /

A2
  • adjecitve
  • British informal fight between husband and wife
  • Concerning your own home or house
  • Concerning or made in your own country
  • noun
  • Someone paid to help with housework in your house

herd

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US / hɜ:d /

UK / hɜ:rd /

B2
  • noun
  • Group of the same animal that eat, live together
  • Group of people who are easily influenced
  • verb
  • To gather animals together to move them
  • To come together into a group

ideal

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US / aɪˈdi:əl /

UK / aɪˈdiəl, aɪˈdil /

A2
  • adjecitve
  • Exactly right; could not be better
  • Which is thought of as being perfect

route

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US / ru:t /

UK / rut, raʊt /

A2
  • noun
  • Way to get from one place to another place; path
  • Path or way that people often use
  • Method of achieving a certain result
  • verb
  • To send along a particular path or way

habitat

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US / 'hæbɪtæt /

UK / ˈhæbɪˌtæt /

B1
  • noun
  • Natural place where a plant or animal lives

livestock

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US / ˈlaɪvstɒk /

UK / ˈlaɪvˌstɑk /

B2
  • noun
  • Any animals kept for use or profit

passive

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US / ˈpæsɪv /

UK / ˈpæsɪv /

B1
  • adjecitve
  • Allowing things to happen with quiet acceptance
  • With sentence's subject being what verb acts on

mammal

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US / 'mæml /

UK / ˈmæməl /

B1
  • noun
  • Animal which drinks milk from its mother

population

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US / ˌpɒpjuˈleɪʃn /

UK / ˌpɑpjəˈleʃən /

A2
  • noun
  • Number of people who live in a country, area etc.

area

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US / 'eərɪə /

UK / ˈɛriə /

A1
  • noun
  • Amount of measured space
  • A specific section or space; part of a region
  • A subject or field of study

correlate

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US / ˈkɒrəleɪt /

UK / ˈkɔ:rəleɪt /

B1
  • verb
  • To have/show the relationship between two things

feel

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US / fi:l /

UK / fil /

A1
  • verb
  • To be aware of or experience an emotion, sensation
  • To sense through direct contact; touch

past

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US / pɑ:st /

UK / pæst /

A2
  • adjecitve
  • No longer current or new
  • adverb
  • So as to go beyond, or further than something
  • noun
  • Time that existed before now, e.g. long ago
  • preposition
  • After a particular time
  • At a later point in distance; beyond

too

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US / tu: /

UK / tu /

A1
  • adverb
  • In addition, also; with emphasis
  • Say that something is more than you want

among

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US / əˈmʌŋ /

UK / əˈmʌŋ /

A1
  • preposition
  • In the center of several things

colony

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US / 'kɒlənɪ /

UK / ˈkɑləni /

B2
  • noun
  • Group (bees, etc.) that live in the same place
  • Country/settlement controlled by another country

here

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US / hɪə(r) /

UK / hɪr /

A1
  • adverb
  • In this place; at this location, position or time

always

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US / 'ɔ:lweɪz /

UK / ˈɔlwez,-wɪz,-wiz /

A1
  • adverb
  • For a very long time
  • At all times; in every situation
  • For ever

after

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US / 'ɑ:ftə(r) /

UK / ˈæftɚ /

A1
  • adverb
  • Later than another time, or behind something
  • conjunction
  • Following something before
  • preposition
  • When an event happened or time has passed

fresh

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US / freʃ /

UK / frɛʃ /

A1
  • adjecitve
  • Clean; not used or dirty
  • Remaining clear, as in a person's memory
  • Newly made or gathered
  • (Water) not salty, usually from a lake or a river

itself

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US / ɪtˈself /

UK / ɪtˈsɛlf /

A1
  • pronoun
  • Referring to it

many

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US / 'menɪ /

UK / ˈmɛni /

A1
  • determiner
  • Used to refer a large number of things

will

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US / wɪl /

UK / wɪl /

A1
  • noun
  • Desire or choice of someone
  • Document saying who gets your money when you die
  • Strong desire to do something; determination
  • Desire to do something; strong wish to do
  • other
  • Used with verbs to express the future
  • verb
  • To leave property to someone after your death
  • To use mental effort to make something happen
  • Am (is, are) likely to do
  • To influence someone to do something
  • To make something happen by strongly wanting it

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

A1
  • adverb
  • In addition; too; in a similar way

live

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US / lɪv /

UK / liv /

A1
  • adjecitve
  • Being broadcast as events happen, not recorded
  • Carrying electric current; able to give a shock
  • Glowing because burning; hot
  • Not yet killed (for food)
  • adverb
  • (Music, drama) as it is performed
  • verb
  • To be alive
  • To experience a particular type of life
  • To make your home in a house or town

kind

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US / kaɪnd /

UK / kaɪnd /

A1
  • adjecitve
  • In a caring and helpful manner
  • friendly and considerate
  • noun
  • One type of thing

how

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US / haʊ /

UK / haʊ /

A1
  • adjecitve
  • To what degree? in what amount?
  • adverb
  • (Used to explain the way to do something)
  • exclamation
  • For what purpose or reason?
  • (Used to ask someone or something's condition)

year

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US / jə: /

UK / jɪr /

A1
  • noun
  • Unit of time equal to 12 months or 365 or 366 days
  • Used to refer to the age of a person

you

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US / jʊ /

UK / ju /

A1
  • pronoun
  • Person someone is speaking or writing to
  • Person or people in general

encounter

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US / ɪn'kaʊntə(r) /

UK / ɛnˈkaʊntɚ /

B1
  • noun
  • A chance meeting; unexpected or unplanned meeting
  • verb
  • To come up against a problem or trouble; meet
  • To meet someone or something unexpectedly

predict

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US / prɪ'dɪkt /

UK / prɪˈdɪkt /

A2
  • verb
  • To guess or estimate what will or might happen

able

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US / 'eɪbl /

UK / ˈebəl /

A2
  • adjecitve
  • Skilled; good at something
  • Having the ability to do something

three

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US / θri: /

UK / θri /

A1
  • number
  • Number 3

tropical

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US / ˈtrɒpɪkl /

UK / ˈtrɑpɪkəl /

B1
  • adjecitve
  • Hot and humid; near to the equator

order

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US / 'ɔ:də(r) /

UK / ˈɔrdɚ /

A1
  • noun
  • Religious or social group, as of nuns
  • Instructions to others to do what you want
  • State in which things are neat and organized
  • What you ask to buy, e.g. food in restaurant
  • Social or political control of an area
  • verb
  • To put things in a sequence, e.g. a, b, c
  • To give instructions to others to do what you want
  • To ask for something you want to buy, e.g. a meal

deadly

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US / ˈdedli /

UK / ˈdɛdli /

A2
  • adjecitve
  • Causing or capable of causing death
  • Being very accurate

feast

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US / fi:st /

UK / fist /

B1
  • noun
  • Religious celebration
  • Special meal with large amounts of food and drink
  • verb
  • To eat a large special meal often in celebration

grantee

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US / grɑ:n'ti: /

UK / grɑ:n'ti: /

A1
  • other
  • A recipient of a grant

into

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US / 'ɪntə /

UK / ˈɪntu /

A1
  • preposition
  • Moving or going inside something
  • In the same direction as; in the direction of
  • So as to become; taking the state of

import

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US / 'ɪmpɔ:t /

UK / ˈɪmpɔrt /

A2
  • noun
  • Goods brought into a country from another
  • Importance of a matter or issue
  • verb
  • To bring goods from one country into another

other

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US / 'ʌðə(r) /

UK / ˈʌðər /

A1
  • adjecitve
  • A thing different from that mentioned
  • determiner
  • (Something) else; not the first (one)
  • pronoun
  • Being the one and only thing of that category

perfect

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US / 'pɜ:fɪkt /

UK / ˈpɚfɪkt /

A1
  • adjecitve
  • So good it cannot be improved
  • verb
  • To do something so well, it cannot be done better

one

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US / wʌn /

UK / wʌn /

A1
  • pronoun
  • You; we; people in general; someone
  • The thing or person previously referred to
  • adjecitve
  • Used to refer to people generally
  • Being a strong example of (something mentioned)
  • number
  • Number 1

than

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US / ðən /

UK / ðən /

A1
  • conjunction
  • Used to compare two things that are not equal

turn

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US / tɜ:n /

UK / tɚn /

A1
  • noun
  • Place where changing of direction happens
  • Your time or chance to perform a duty
  • Your chance to play or do in say a game
  • Unexpected change, as in the weather
  • verb
  • To become (a particular age)
  • To become a different quality, color, etc.
  • To change the direction of something, e.g. a car
  • To move in an opposite direction or position
  • To shape metal with a spinning tool

rate

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US / reɪt /

UK / ret /

A1
  • noun
  • Current price or cost of something
  • Speed or frequency of events over time
  • verb
  • To assess something or consider its qualities

seek

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US / si:k /

UK / sik /

A2
  • verb
  • To ask someone for help
  • To search for; try to find or do; look for
  • To try to achieve something

the

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US / ðə /

UK / ðə /

A1
  • article
  • Used to refer to something already mentioned
  • Used to show there is only one of something
  • determiner
  • Used to describe all of a family

across

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US / əˈkrɔs /

UK / əˈkrɔs,əˈkrɑs /

A1
  • adverb
  • Distance from one side to another
  • (Go) from one side to the other of something

expose

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US / ɪk'spəʊz /

UK / ɪkˈspoʊz /

A2
  • noun
  • News article revealing secret information
  • verb
  • To make visible, without covering or protection
  • To allow light through a cameras lens onto film
  • To be talked about in the media
  • To make a secret known to the public
  • To experience something, often a harmful thing

free

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US / fri: /

UK / fri /

A1
  • adjecitve
  • Living, happening without being controlled
  • Costing no money
  • Not working; not busy
  • verb
  • To release (e.g. bird) from a cage or prison

may

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US / meɪ /

UK / me /

A1
  • noun
  • 5th month of the year
  • other
  • Used to express a desire
  • Expresses permission, possibility or probability
  • Used to show that a thing could be true

this

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US / ðɪs /

UK / ðɪs /

A1
  • adjecitve
  • Used to indicate something already been discussed
  • Used to indicate something happening around now
  • adverb
  • An indication by a physical motion or gesture
  • A specific amount of
  • determiner
  • Person, thing, or idea near you
  • pronoun
  • Person, thing that has already been discussed

burgeon

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US / ˈbɜ:dʒən /

UK / ˈbɜ:rdʒən /

C2
  • verb
  • To grow or develop rapidly

dumb

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US / dʌm /

UK / dʌm /

B1
  • adjecitve
  • Senseless; stupid

level

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US / 'levl /

UK / ˈlɛvəl /

A2
  • adjecitve
  • (Sports) equal to another
  • Being steady and determined (e.g. a voice)
  • noun
  • Specific height of something
  • Amount of ability you have compared to others
  • Floor or deck within a building
  • Tool used to determine if something is lying flat
  • verb
  • To aim a gun at someone
  • To destroy a building; flatten an area completely
  • To make things flat or even
  • To make a score equal to another, in sports

wildlife

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US / ˈwaɪldlaɪf /

UK / ˈwaɪldˌlaɪf /

B1
  • noun
  • All wild animals

few

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US / fju: /

UK / fju /

A1
  • pronoun
  • Not many, a small number

much

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US / mʌtʃ /

UK / mʌtʃ /

A1
  • adjecitve
  • Very; to a high level or degree
  • adverb
  • A lot; large amount; a high degree of
  • Nearly; basically
  • On many occasions; often
  • noun
  • A large amount; a great quantity

incubation

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US / ˌɪŋkjuˈbeɪʃn /

UK / ˌɪnkjəˈbeʃən, ˌɪŋ- /

B2
  • noun
  • Development in a particular environment
  • Keeping eggs warm until hatched

under

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US / ˈʌndə(r) /

UK / ˈʌndɚ /

A1
  • adjecitve
  • In the same place as another thing, but lower
  • adverb
  • In a lower quantity or price than expected
  • preposition
  • According to the terms of an agreement or law
  • Managed or controlled by the authority of
  • Being of a lesser quality or amount than expected
  • Influenced or affected by something or someone
  • Less or lower in age, amount, size or number

superficial

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US / ˌsu:pəˈfɪʃl /

UK / ˌsupɚˈfɪʃəl /

C2
  • adjecitve
  • On the surface only; not deep

frequently

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US / ˈfri:kwəntli /

UK / ˈfrikwəntlɪ /

A2
  • adverb
  • Often; regularly

for

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US / fə(r) /

UK / fɔr,fə /

A1
  • preposition
  • Used to show the purpose, or need of something

time

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US / taɪm /

UK / taɪm /

A1
  • noun
  • Speed at which music is played; tempo
  • Point as shown on a clock, e.g. 3 p.m
  • Number of hours, minutes needed to do something
  • Occasion when something happens
  • Period or occasion that something occurred
  • Period in history or the past
  • Something measured in minutes, hours, days, etc.
  • How long an event takes; duration
  • verb
  • To check speed at which music is performed
  • To choose a specific moment to do something
  • To measure how long an event takes, e.g. a race
  • To schedule something to occur at a specific moment

why

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US / waɪ /

UK / hwaɪ, waɪ /

A1
  • adverb
  • Question word to ask for a reason
  • exclamation
  • (Used to express surprise or approval)

determine

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US / dɪ'tɜ:mɪn /

UK / dɪˈtɚmɪn /

A2
  • verb
  • To control exactly how something will be or act
  • To establish the facts about; discover

farm

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US / fɑ:m /

UK / fɑ:rm /

A1
  • noun
  • Land used for growing crops or raising animals
  • verb
  • To use land for raising plants or animals for food

period

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US / ˈpɪəriəd /

UK / ˈpɪriəd /

A1
  • noun
  • Set amount of time during which events take place
  • A way to emphasize what you will say
  • A full stop (.), marking the end of a sentence
  • A menstrual cycle
  • A set time for a class to be held

never

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US / 'nevə(r) /

UK / ˈnɛvɚ /

A1
  • adverb
  • Not ever; not at any time

control

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US / kən'trəʊl /

UK / kənˈtrol /

A1
  • noun
  • A device designed to operate a machine
  • Participant in experiment that is left untouched
  • Act to dominate or command; make manageable
  • A law limiting the growth or spread of something
  • A place which overseas or manages e.g. a factory
  • verb
  • To direct or influence the behavior of something

victim

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US / ˈvɪktɪm /

UK / ˈvɪktɪm /

B1
  • noun
  • Person/thing affected by an unpleasant event
  • Person/animal killed and offered as a sacrifice
  • Person feeling helpless in times of bad luck
  • Person who is tricked or made to suffer

animal

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US / ˈænɪml /

UK / ˈænəməl /

A1
  • noun
  • A living creature that is not a plant or person

blame

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US / bleɪm /

UK / blem /

A2
  • noun
  • Act of saying someone did something bad
  • verb
  • To say someone is responsible for something bad

preliminary

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US / prɪˈlɪmɪnəri /

UK / prɪˈlɪməˌnɛri /

B1
  • adjecitve
  • Happening or necessary before a thing happens
  • noun
  • Action preparing for the main event

such

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US / sʌtʃ /

UK / sʌtʃ /

A1
  • determiner
  • Being similar to
  • (Thing) as previously stated or referred to
  • adverb
  • (Used to emphasize the quality of an adjective)

ask

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US / ɑ:sk /

UK / æsk /

A1
  • verb
  • To say to someone that you want something

disorientation

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US / dɪsˌɔ:rɪən'teɪʃn /

UK / dɪsˌɔrriɛnˈteʃən /

B1
  • noun
  • Not knowing where you are or what you are doing

die

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US / daɪ /

UK / daɪ /

A1
  • noun
  • Cube with dots numbering 1-6 on it used in games
  • verb
  • To cease to function or work
  • (Of a thing) to stop being used or done
  • (Of a person) to stop living

since

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US / sɪns /

UK / sɪns /

A1
  • adverb
  • At a point before the present time
  • conjunction
  • For this reason; because
  • preposition
  • From the time in the past that

test

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US / test /

UK / test /

A1
  • noun
  • A medical examination
  • Action to establish the truth or nature of
  • Examination; questions to measure knowledge
  • verb
  • To be given a medical examination
  • To try to establish the truth or nature of
  • To ask a series of questions to measure knowledge

well

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US / wel /

UK / wɛl /

A1
  • adjecitve
  • Being in a fortunate, good condition or state
  • Healthy and in good condition
  • adverb
  • In an acceptable, proper, or successful manner
  • In a complete, total, or full manner
  • A great and considerable degree
  • In a successful way, in a good or satisfactory way
  • exclamation
  • Used to begin or continue a particular statement
  • Used to show you want to start saying something
  • Used to express that you are waiting for a reply
  • You say this to change the topic of a conversation
  • Used to indicate you are making a final remark
  • noun
  • Long deep hole in the ground to get water
  • verb
  • To cause your eyes to fill with tears

source

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US / sɔ:s /

UK / sɔrs, sors /

A2
  • adjecitve
  • Produces or provides what is wanted or needed
  • noun
  • Piece of information; a person giving information
  • Place from which something necessary comes
  • verb
  • To get, e.g. a raw material, from somewhere

specifically

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US / spəˈsɪfɪkli /

UK / spəˈsɪfɪkli /

A2
  • adverb
  • As regards a particular thing; closely related to
  • In particular

green

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US / gri:n /

UK / ɡrin /

A1
  • adjecitve
  • Color of young leaves
  • Covered with vegetation, e.g. grass
  • Concerned about protecting the environment
  • The color of young leaves
  • Lacking in experience/knowledge due to being young
  • Being not fully grown or ripe, as in fruit
  • noun
  • Large grassy area
  • used as a part of a name of a place (UK)

question

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US / 'kwestʃən /

UK / ˈkwɛstʃən /

A1
  • noun
  • Issue or problems you are dealing with
  • What you ask about; issue
  • verb
  • To ask for or try to get information
  • To have or express concerns or uncertainty

vast

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US / vɑ:st /

UK / væst /

A2
  • adjecitve
  • Being very large in size or amount

cause

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US / kɔ:z /

UK / kɔz /

A2
  • noun
  • Belief, goal or organization that people support
  • Reason for
  • verb
  • To make something happen; create effect or result

infect

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US / ɪn'fekt /

UK / ɪnˈfɛkt /

B1
  • verb
  • To introduce a computer virus to
  • To give a disease, bacteria or virus to
  • To make people feel the same emotion you are

again

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US / ə'ɡen /

UK / əˈɡɛn /

A1
  • adverb
  • One more time, once more

about

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US / ə'baʊt /

UK / əˈbaʊt /

A1
  • adverb
  • To be ready to; going to
  • Nearly; approximately; roughly
  • Near; next to; close to
  • In every direction; in the area of
  • preposition
  • Concerning or of (a topic)

even

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US / 'i:vn /

UK / ˈivən /

A1
  • adjecitve
  • Being equal in influence, power, possibility etc.
  • Being divided equally or fairly
  • (Of teams/contest) with similar chances of success
  • Smooth, level, or regular
  • Can be divided by 2; ending in 2, 4, 6, 8, or 0
  • At a regular, equally steady manner
  • Remaining steady and unchanging
  • adverb
  • (When this is surprising) as well; too
  • (Used to compare two things/stress the difference)
  • verb
  • To make something level; to flatten
  • To make something equal

eventually

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US / ɪˈventʃuəli /

UK / ɪˈvɛntʃuəli /

A2
  • adverb
  • After a long time; after many attempts; in the end

different

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US / ˈdɪfrənt /

UK / ˈdɪfrənt /

A1
  • adjecitve
  • Not of the same kind; unlike other things

like

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US / laɪk /

UK / laɪk /

A1
  • adjecitve
  • Being equal in status or kind to something else
  • Similar; the same
  • adverb
  • For example
  • preposition
  • Used as a filler; used to ad emphasis
  • In a way similar to the way something is done
  • Such as; for example
  • verb
  • To want to
  • To find something pleasing; to prefer something

people

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US / 'pi:pl /

UK / ˈpipəl /

A1
  • noun
  • Persons sharing culture, country, background, etc.
  • Men, Women, Children

prefer

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US / prɪˈfɜ:(r) /

UK / prɪˈfɚ /

A1
  • verb
  • To like something better than something else

that

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US / ðæt /

UK / ðæt, ðət /

A1
  • adjecitve
  • The person or thing being talked about
  • Used to identify something both the speakers know
  • adverb
  • Used to reinforce adjectives and adverbs
  • To such a degree
  • conjunction
  • Used to connect a noun clause
  • Used to introduce an adverbial clause
  • Used to introduce a noun clause
  • determiner
  • Used as a noun to refer to something
  • pronoun
  • Referring an object far away
  • Used to refer to the relative pronoun ‘which’

what

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US / wɒt /

UK / hwɑt, hwʌt, wɔt, wʌt,hwət, wət /

A1
  • pronoun
  • Thing or things that; the same kind as
  • Used to emphasize something you are about to say
  • adjecitve
  • Used to refer to a particular amount, or number
  • Used to place emphasis on a particular quality
  • adverb
  • To a certain degree
  • determiner
  • Question words used for asking for information
  • exclamation
  • Used to express excitement, shock, or surprise
  • Used to ask people to repeat something they said

threat

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US / θret /

UK / θrɛt /

A2
  • noun
  • Warning of probable trouble
  • A warning that you may be harmed

thrive

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US / θraɪv /

UK / θraɪv /

B2
  • verb
  • To be or become healthy or successful

docile

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US / 'dəʊsaɪl /

UK / ˈdɑsəl, -ˌaɪl /

C1
  • adjecitve
  • Easy to control, make obey, or teach

great

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US / ɡreɪt /

UK / ɡret /

A1
  • adjecitve
  • Very large in size
  • Very important
  • Very good; fantastic; wonderful
  • adverb
  • Very good; better than before
  • noun
  • Successful and well-admired person

lab

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US / læb /

UK / læb /

B1
  • noun
  • Short for 'laboratory'

find

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US / faɪnd /

UK / faɪnd /

A1
  • noun
  • Object discovered by chance
  • Things that have been discovered from searching
  • verb
  • To become aware of something that is happening
  • To discover or meet by chance
  • To decide if someone is guilty of a crime, or not
  • To learn through study, research, or effort
  • To discover something by looking for it

mean

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US / mi:n /

UK / min /

A1
  • adjecitve
  • Being good at
  • Nasty; unkind
  • Not liking to spend money; cheap; stingy
  • noun
  • Average of a set of numbers
  • verb
  • To express a particular idea or thought
  • To intend to do something in particular
  • To have a particular meaning or value

microscope

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US / ˈmaɪkrəskəʊp /

UK / ˈmaɪkrəskoʊp /

B1
  • noun
  • Scientific device making small things look bigger

despite

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US / dɪˈspaɪt /

UK / dɪˈspaɪt /

A2
  • preposition
  • Without being affected by something; in spite of

first

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US / fɜ:st /

UK / fɚst /

A1
  • adjecitve
  • 1st; Coming before all others in time or place
  • noun
  • Something that has not happened before
  • Position of the winner of a competition

present

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US / 'preznt /

UK / ˈprɛznt /

A1
  • adjecitve
  • Being in attendance; being there; having turned up
  • noun
  • Gift
  • Verb tense indicating an action is happening now
  • Current time; now
  • verb
  • To introduce someone to others
  • To host a program on television or radio
  • To give a speech or presentation
  • To show something to someone who will examine it
  • To appear or happen
  • To give an award or prize to someone

extent

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US / ɪkˈstent /

UK / ɪkˈstɛnt /

A2
  • noun
  • Point, level or limit to which something reaches
  • Range or space included in something

must

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US / məst /

UK / mʌst /

A1
  • noun
  • Something that is necessary or required
  • other
  • (Used to state that something ought to be true)
  • Used to say something is required or necessary

then

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US / ðen /

UK / ðɛn /

A1
  • adverb
  • A time that is not now
  • Following another thing in time or arrangement
  • Following on reasonably from what was just stated
  • At that time, not now

number

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US / ˈnʌmbə(r) /

UK / ˈnʌmbɚ /

A1
  • noun
  • Symbols such as 1, 2, 56, 793
  • Particular song or dance performed during a show
  • Total quantity or amount of things
  • verb
  • To put numbers on things
  • To assign a sequence within a group, series, set
  • To claim to be part of a larger group, series, set

namesake

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US / ˈneɪmseɪk /

UK / ˈnemˌsek /

C1
  • noun
  • Someone with the same name as someone else

survey

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US / 'sɜ:veɪ /

UK / ˈsɜː(r)veɪ /

A2
  • noun
  • Broad view or general description of something
  • Act of measuring land or property to make a map
  • Set of questions used to ask people about a topic
  • verb
  • To offer a broad view or general description
  • To measure an area of land to make a map of it
  • To ask people a question about a particular topic

table

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US / ˈteɪbl /

UK / ˈtebəl /

A1
  • noun
  • Diagram that shows data in rows and columns
  • Raised flat surface you sit at to work or eat
  • verb
  • To leave an idea to be discussed at a later date

south

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US / saʊθ /

UK / saʊθ /

A1
  • adjecitve
  • Direction to your right when facing the rising sun
  • Coming from the opposite direction from north
  • noun
  • The direction to your right of the rising sun

become

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US / bɪ'kʌm /

UK / bɪˈkʌm /

A1
  • verb
  • To begin to be; grow to be; develop into
  • To be suitable for a particular job or role

creature

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US / ˈkri:tʃə(r) /

UK / ˈkritʃɚ /

A2
  • noun
  • Animal of any type

disease

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US / dɪˈzi:z /

UK / dɪˈziz /

A2
  • noun
  • Illness that affects a person, animal, or plant

same

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US / seɪm /

UK / sem /

A1
  • adjecitve
  • Being equal in quality and amount
  • Identical; not different
  • Not changing; constant

bat

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US / bæt /

UK / bæt /

A2
  • noun
  • Small flying mouse-like animal with wings
  • Object used for hitting a ball in various games
  • verb
  • To use a wooden stick in baseball or cricket

but

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US / bət /

UK / bʌt,bət /

A1
  • conjunction
  • Used before you say something different, opposite

daniel

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US / 'dænjəl /

UK / 'dænjəl /

A1
  • noun
  • (Old Testament) a youth who was taken into the court of Nebuchadnezzar and given divine protection w
  • other
  • A wise and upright judge
  • An Old Testament book that tells of the apocalyptic visions and the experiences of Daniel in the cou

give

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US / ɡɪv /

UK / ɡɪv /

A1
  • noun
  • Degree of flexibility in something, a material
  • verb
  • To hand over or present something to someone
  • To cause someone to have or experience something

research

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US / rɪ'sɜ:tʃ /

UK / rɪˈsɚtʃ, ˈriˌsɚtʃ /

A2
  • noun
  • Study done to discover new ideas and facts
  • Work done to find or discover knowledge
  • verb
  • To study in order to discover new ideas and facts

andes

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US / ˈændiːz /

UK / ˈændiz /

A1
  • noun
  • A mountain range in South America running miles along the Pacific coast

can

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US / kæn /

UK / kən,kæn /

A1
  • noun
  • A metal container for storing food
  • other
  • Able to; have the skill to; have the time to
  • verb
  • To have permission to
  • To be possible to do
  • To preserve food by sealing it in a metal container

recent

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US / 'ri:snt /

UK / ˈrisənt /

A1
  • adjecitve
  • Happening or beginning not long ago

potentially

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US / pə'tenʃəlɪ /

UK / pəˈtɛnʃəlɪ /

B1
  • adverb
  • That could happen or become reality

collect

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US / kəˈlekt /

UK / kəˈlɛkt /

A2
  • adverb
  • By asking the receiver of a call to pay for it
  • verb
  • To ask for money, e.g. for a charity
  • To gather things, people together in one place
  • To get and keep one type of things as a hobby
  • To take things and bring them together
  • To go and receive, e.g. a prize or an award
  • To take control of your own feelings or thoughts

peru

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US / pə'rʊ /

UK / pə'rʊ /

A1
  • proper noun
  • A country in South America on the Pacific coast, crossed throughout its length by the Andes; populat

ranch

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US / rɑ:ntʃ /

UK / ræntʃ /

B1
  • noun
  • Large farm, made mostly of land for raising cattle
  • verb
  • To do the work of raising cattle

whether

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US / ˈweðə(r) /

UK / ˈhwɛðɚ, ˈwɛð- /

A1
  • conjunction
  • If something will happen or not

development

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US / dɪ'veləpmənt /

UK / dɪˈvɛləpmənt /

A2
  • noun
  • Act or process of growing bigger or more advanced
  • A new event related to a previous event

food

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US / fu:d /

UK / fud /

A1
  • noun
  • What people and animals eat to live
  • Things taken in by plants to maintain life
  • A particular style or type of cooking, e.g. Asian

not

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US / nɒt /

UK / nɑt /

A1
  • adverb
  • Word indicating the negative
  • (Used to form the negative of verbs)

yet

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US / jet /

UK / jɛt /

A1
  • adverb
  • At a later time (used after ‘not’)
  • (Used to emphasize that thing is, will be greater)
  • Eventually; at a future time
  • Until now; up to the present
  • conjunction
  • Adding to what has been said, often as a contrast

and

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US / ənd /

UK / ənd, ən,ænd /

A1
  • conjunction
  • Used to refer to two or more things
  • Plus; in addition; on top of that
  • Used to introduce an action that follows another

back

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US / bæk /

UK / bæk /

A1
  • adjecitve
  • Farthest from the front e.g. in a classroom
  • adverb
  • Have returned to a place you were before
  • noun
  • The part of a chair that the upper body leans upon
  • Location at the rear of something
  • The reverse of side something
  • Area on the rear of your body
  • verb
  • To bet money on something
  • To go backwards in a car
  • To support and encourage someone or some cause

hope

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US / həʊp /

UK / hop /

A1
  • noun
  • When you wish something will happen; what you wish
  • verb
  • To expect and want something to happen

ill

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US / /

UK / /

A2
  • adjecitve
  • Not well or sick
  • noun
  • Sickness or problem; bad conditions

increasingly

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US / ɪnˈkri:sɪŋli /

UK / ɪnˈkriːsɪŋli /

A2
  • adverb
  • More and more; in greater degree or amount

strain

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US / streɪn /

UK / stren /

B2
  • noun
  • Injury to a muscle, leg etc. through overuse
  • Type or variation of a disease or bacillus
  • verb
  • To remove the water from (food) using a colander
  • To injure a muscle, leg etc. by using it too much

along

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US / əˈlɒŋ /

UK / əˈlɔ:ŋ /

A1
  • adverb
  • As a companion; taken with someone
  • preposition
  • At a point on a line

from

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US / frəm /

UK / frʌm, frɑm,frəm /

A1
  • preposition
  • Starting at a particular place, time or level

form

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US / fɔ:m /

UK / fɔrm /

A1
  • noun
  • Sports team or person's current winning record
  • Document you complete when making an application
  • Visible shape or style; type; kind
  • verb
  • To organize something such as a club or group
  • To develop; to come into a shape or substance
  • To make something into a particular shape

out

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US / aʊt /

UK / aʊt /

A1
  • adverb
  • No longer stylish (e.g. fashion)
  • Away from home, business, or the usual place
  • In a direction/movement away from inside or center
  • noun
  • Act when a batter cannot continue playing
  • verb
  • To tell people a secret

national

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US / 'næʃnəl /

UK / ˈnæʃənəl, ˈnæʃnəl /

A2
  • adjecitve
  • Concerning a nation as a whole
  • noun
  • A person of a particular country

environmental

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US / ɪnˌvaɪrənˈmentl /

UK / ɛnˌvaɪrənˈmɛntl:, -ˌvaɪən /

A2
  • adjecitve
  • Of the natural world of plants and animals

finally

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US / ˈfaɪnəli /

UK / ˈfaɪnəli /

A1
  • adverb
  • used especially at the beginning of a sentence to introduce the last point or idea
  • After a long time or some difficulty

native

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US / ˈneɪtɪv /

UK / ˈnetɪv /

A2
  • adjecitve
  • Caused by natural ability; innate
  • noun
  • Someone from or born in a specific country
  • Original inhabitant, e.g. before others
  • Person speaking a language from birth

rare

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US / reə(r) /

UK / rɛr /

A2
  • adjecitve
  • (Of meat) cooked, but still red and juicy
  • Unusual or out of the ordinary; not common

two

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US / tu: /

UK / tu /

A1
  • number
  • 2

antibody

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US / ˈæntibɒdi /

UK / ˈæntibɑ:di /

B1
  • noun
  • Substance produced by the body to fight disease

drink

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US / drɪŋk /

UK / drɪŋk /

A1
  • noun
  • A liquid that you put in your mouth
  • verb
  • To put water in your body through your mouth

frightening

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US / ˈfraɪtnɪŋ /

UK / ˈfraɪtnɪŋ /

A2
  • adjecitve
  • Being scary
  • verb
  • To make someone afraid or nervous

large

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US / lɑ:dʒ /

UK / lɑ:rdʒ /

A1
  • adjecitve
  • Big; of great size; broad, tall, wide, or fat

most

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US / məʊst /

UK / most /

A1
  • adverb
  • Very; extremely
  • Greatest possible degree
  • pronoun
  • Nearly all of something

aggressor

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US / əˈgresə(r) /

UK / əˈɡrɛsɚ /

C1
  • noun
  • Country or person that starts a fight or conflict

come

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US / kʌm /

UK / kʌm /

A1
  • verb
  • To arrive at a place
  • (Of mail) to be delivered
  • To move toward someone; go with someone
  • To reach a certain point or state

characteristic

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US / ˌkærəktəˈrɪstɪk /

UK / ˌkærəktəˈrɪstɪk /

A2
  • adjecitve
  • Typical or distinctive

devoted

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US / dɪˈvəʊtɪd /

UK / dɪˈvotɪd /

B1
  • adjecitve
  • Dedicated and committed to
  • verb
  • To dedicate
  • To decide to use or give (your time, efforts)

help

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US / help /

UK / hɛlp /

A1
  • noun
  • Something given to enable a person to do something
  • Assistance given to someone in need
  • Someone who makes something easier or possible
  • verb
  • To act to enable a person to do something; assist
  • To make something better or less difficult

proportion

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US / prəˈpɔ:ʃn /

UK / prəˈpɔrʃən, -ˈpor- /

A2
  • noun
  • A part of a whole thing
  • State of balance between two or more things
  • Size of one thing compared to the size of another
  • verb
  • To balance the size of something with another

pose

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US / pəʊz /

UK / poʊz /

B1
  • noun
  • False behavior to gain respect or liking
  • verb
  • To be or exist as (a problem, threat etc.)
  • To suggest an idea, question or solution
  • To sit or stand while being painted or drawn
  • To put someone in a position to be photographed

another

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US / əˈnʌðə(r) /

UK / əˈnʌðɚ /

A1
  • adjecitve
  • One more, but not this
  • determiner
  • One more added
  • pronoun
  • One more (thing)

region

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US / 'ri:dʒən /

UK / ˈridʒən /

A2
  • noun
  • Part of a country, of the world, area, etc.

amazon

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US / 'æməzən /

UK / 'æməzən /

A1
  • noun
  • A large strong and aggressive woman
  • other
  • Mainly green tropical American parrots

far

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US / fɑ:(r) /

UK / fɑr /

A1
  • adjecitve
  • A long way away
  • Being a long way away
  • adverb
  • To a large degree or extent

reduce

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US / rɪ'dju:s /

UK / rɪˈdus, -ˈdjus /

A2
  • verb
  • To try to decrease, e.g. your weight if overweight
  • To boil a liquid until it has decreased in amount
  • To make something smaller in size, amount, level

where

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US / hwɛə /

UK / hwɛr, wɛr /

A1
  • conjunction
  • At or in the place which
  • In whatever place
  • pronoun
  • Word you use to ask the location of something

ago

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US / əˈgəʊ /

UK / əˈgoʊ /

A1
  • adverb
  • At a specified length of time in the past

death

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US / deθ /

UK / dɛθ /

A2
  • noun
  • When someone dies; the end of life

their

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US / ðɛː /

UK / ðer /

A1
  • determiner
  • Belonging to them

mountain

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US / 'maʊntən /

UK / ˈmaʊntən /

A1
  • noun
  • Very high piece of land, higher than a hill

they

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US / ðeɪ /

UK / ðe /

A1
  • pronoun
  • Two or more people, animals, or things

act

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US / ækt /

UK / ækt /

A1
  • noun
  • What someone did; action; behavior
  • A law or rule passed by a government we must obey
  • One of the parts that a stage play is divided into
  • verb
  • To behave in a certain way
  • To perform on a stage or in a movie

believe

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US / bɪ'li:v /

UK / bɪˈliv /

A1
  • verb
  • To think or accept that something is true
  • To have a particular opinion about something

country

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US / ˈkʌntri /

UK / ˈkʌntri /

A1
  • noun
  • An area of land that is controlled by a government
  • Open land that is away from towns and cities

dye

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US / daɪ /

UK / daɪ /

B1
  • noun
  • A liquid that colors hair, cloth etc.
  • verb
  • To make (hair, leather) colored by using chemicals

human

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US / 'hju:mən /

UK / ˈhjumən /

A1
  • adjecitve
  • Concerning or characteristic of people
  • noun
  • A person; a man, woman or child

mythical

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US / ˈmɪθɪkl /

UK / ˈmɪθɪkəl /

B1
  • adjecitve
  • Based on beliefs unsupported by facts

prevention

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US / prɪˈvenʃn /

UK / prɪˈvɛnʃən /

B1
  • noun
  • Act of stopping something bad from happening

add

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US / æd /

UK / æd /

A1
  • verb
  • To include as well
  • To put two things or numbers together, e.g. 2+2

mining

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US / ˈmaɪnɪŋ /

UK / ˈmaɪnɪŋ /

B2
  • noun
  • Act of digging to get coal, gold, silver etc.
  • verb
  • To place a bomb in the ground or the sea
  • To dig into the earth or sea to obtain minerals

take

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US / teɪk /

UK / tek /

A1
  • noun
  • Filming of a single scene for TV or the movies
  • verb
  • To accept something that is offered
  • To use a method of traveling, e.g. a bus or train
  • To use a camera to make (a photo)
  • To pick up something and go away with it
  • To study a subject in school
  • To attempt to pass (an exam)
  • To require a certain amount of time, money, space

cattle

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US / ˈkætl /

UK / ˈkætl /

B1
  • noun
  • Cows or bulls on a farm

result

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US / rɪ'zʌlt /

UK / rɪˈzʌlt /

A2
  • noun
  • Something produced through tests or experiments
  • Final score of a competition, election or game
  • verb
  • To be the outcome of other causes and effects

theory

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US / ˈθiəri /

UK / ˈθiəri, ˈθɪri /

A2
  • noun
  • Ideas or principles that explain facts or events

show

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US / ʃəʊ /

UK / ʃo /

A1
  • noun
  • False display of love, emotion or action
  • An event for displaying or promoting goods
  • Play, opera or theater production
  • Presentation that is broadcast on TV or radio
  • verb
  • To be easily seen or displayed
  • To display your emotions or feelings
  • To let someone see something; display
  • To explain or teach how something is done
  • To lead someone somewhere; point them to something
  • To prove something to be true, correct
  • To reveal or allow something to be seen

someday

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US / 'sʌmdeɪ /

UK / 'sʌmˌdeɪ /

C2
  • adverb
  • At some unspecified time in the future

virus

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US / 'vaɪrəs /

UK / ˈvaɪrəs /

B1
  • noun
  • File secretly put on computers to cause harm
  • Living organism that causes disease or sickness

america

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US / ə'merɪkə /

UK / əˈmɛrɪkə /

A1
  • noun
  • The United States of America; North America and/or South America

common

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US / 'kɒmən /

UK / ˈkɑmən /

A1
  • adjecitve
  • Shared; Belonging to or used by everyone
  • Typical, normal; not unusual
  • noun
  • Area in a city or town that is open to everyone
  • Field near a village owned by the local community

chance

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US / tʃɑ:ns /

UK / tʃæns /

A1
  • adjecitve
  • Happening by luck; not planned
  • Taking a risk to try something
  • noun
  • The way something happens without planning
  • An opportunity; favorable circumstances, situation
  • The possibility that something will happen
  • verb
  • To occur just through luck; happen
  • To take a risk to try something

who

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US / hu: /

UK / hu /

A1
  • pronoun
  • Which person
  • Used to introduce information about people

wipe

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US / waɪp /

UK / waɪp /

A2
  • noun
  • Act to clean or dry something with a cloth
  • verb
  • To clean or dry something with a cloth
  • To spread a liquid on something

work

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US / wɜ:k /

UK / wɚk /

A1
  • adjecitve
  • Activity completed in order to make money
  • noun
  • The product of some artistic or literary endeavor
  • Everything created by an author, artist, musician
  • Activity you do in order to make money
  • Place of employment
  • Final product or result of a some labor or effort
  • verb
  • To bring into a specific state of success
  • To be functioning properly, e.g. a car
  • To do your job in your company or workplace
  • To make an effort to do something
  • To operate a machine or device

fluorescent

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US / ˌflɔ:ˈresnt /

UK / flʊˈrɛsənt, flɔ-, flo- /

B2
  • adjecitve
  • Having the property of fluorescence; brightly lit

log

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US / lɒg /

UK / lɔ:g /

B1
  • noun
  • Detailed account of events and progress on journey
  • Piece of a tree that has fallen or been cut
  • verb
  • To move a certain distance or speed, as recorded
  • To leave a website or computer account
  • To record something in an official account
  • To cut trees down and take the wood to use it

outbreak

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US / ˈaʊtbreɪk /

UK / ˈaʊtˌbrek /

B2
  • noun
  • Sudden occurrence of illness, discontent etc.

main

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US / meɪn /

UK / men /

A1
  • adjecitve
  • Most important; most often used

datum

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US / ˈdeɪtəm /

UK / ˈdetəm, ˈdætəm, ˈdɑtəm /

B1
  • noun
  • Item of factual information

his

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US / hɪz /

UK / hɪz /

A1
  • pronoun
  • Something belonging to a male person

muscle

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US / 'mʌsl /

UK / ˈmʌsəl /

A2
  • noun
  • Physical power
  • Body tissue that moves parts of the body
  • verb
  • To use or muscles of force to get what you want

settler

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US / ˈsetlə(r) /

UK / ˈsɛtlɚ /

B1
  • noun
  • Person going to live in an uninhabited region

with

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US / wɪð /

UK / wɪð, wɪθ /

A1
  • preposition
  • As an employee of a certain company
  • Against something or someone
  • By using something as a means
  • Due to; because of
  • Including
  • Possessing as a feature
  • Related to
  • (Of the manner/attitude by which you do something)
  • Used to express that people or things are together

transmission

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US / trænsˈmɪʃn /

UK / trænsˈmɪʃən, trænz- /

B1
  • noun
  • Part of car including gears affecting speed of car
  • Electronic signal sent by radio waves; broadcast
  • Transfer of data from one machine to another
  • Transfer of money to another person or place
  • Act or process of transferring something to others

clear

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US / klɪə(r) /

UK / klɪr /

A1
  • adjecitve
  • Empty; without anything in it or on it
  • Being certain and without doubt
  • Being without any streaks, spots, or cracks
  • Easy to understand; well-explained; obvious
  • adverb
  • Completely; entirely; through the whole of
  • Away from; free from
  • verb
  • To recover from or remove a problem
  • To get rid of the entire contents of
  • To give permission for something to happen
  • To make a place or surface empty by removing
  • To prove that someone is not guilty or to blame

hand

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US / hænd /

UK / hænd /

A1
  • noun
  • Cards given to a player in a card game
  • Piece of a clock that points to the time
  • Someone who performs physical tasks or work
  • Body part at the end of a person's arm
  • Help for someone performing a particular action
  • Condition of having power or influence
  • Member of the crew of a ship
  • verb
  • To give something to someone personally

indicate

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US / ˈɪndɪkeɪt /

UK / ˈɪndɪˌket /

A2
  • verb
  • To show something; direct attention to; point out
  • To represent something using a symbol or sign

vampire

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US / ˈvæmpaɪə(r) /

UK / ˈvæmˌpaɪr /

B2
  • noun
  • Bloodsucking dead person who bites neck of victim

blood

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US / blʌd /

UK / blʌd /

A2
  • adjecitve
  • Related by birth; family
  • noun
  • Red liquid in the bodies of people and animals
  • verb
  • To be initiated into something, e.g. a secret club

mouth

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US / maʊθ /

UK / maʊθ /

A1
  • noun
  • Hole in the face used for eating and talking
  • Opening of a container such as a bottle
  • Area where a river enters a large body of water
  • verb
  • To say words without speaking

center

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US / 'sentə /

UK / ˈsɛntɚ /

A1
  • noun
  • Community place people go health or social reasons
  • Place in the middle of something
  • Person or thing that is attracting attention
  • verb
  • To direct focus toward something

fall

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US / fɔ:l /

UK / fɔl /

A1
  • noun
  • Season after summer and before winter; Autumn
  • A drop in amount; decrease
  • Dropping from a standing position to the ground
  • verb
  • To drop in amount; to decrease
  • To come down from a higher position suddenly
  • To go from standing to the ground, by accident

sample

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US / ˈsɑ:mpl /

UK / ˈsæmpl /

A2
  • noun
  • A small quantity of something used as a taster
  • verb
  • To try (e.g. food, drink), to see if you like it

could

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US / kəd /

UK / kʊd /

A1
  • other
  • Past form of 'can' to mean have ability
  • Used to ask for something politely, or to offer

foam

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US / fəʊm /

UK / foʊm /

B1
  • noun
  • Mix of a liquid and air to form a mass of bubbles
  • verb
  • To mix air and liquid to form a mass of bubbles

know

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US / nəʊ /

UK / noʊ /

A1
  • verb
  • To be familiar with a person or place, thing
  • To feel sure or be convinced about something
  • To discover or be aware of something
  • To be able to distinguish
  • To have knowledge of things

weakness

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US / ˈwi:knəs /

UK / ˈwiknɪs /

A2
  • noun
  • Fault or bad quality preventing success
  • Liking for something that you are a bit ashamed of

feed

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US / fi:d /

UK / fid /

A2
  • noun
  • Food given to animals
  • verb
  • To give food, e.g. to animals or a baby
  • To push something through an opening
  • To provide necessary supplies to

increase

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US / ɪn'kri:s /

UK / ɪnˈkris /

A1
  • noun
  • Fact of increasing; amount something grows by
  • verb
  • To make or become larger in size or amount

widespread

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US / ˈwaɪdspred /

UK / ˈwaɪdˈsprɛd /

A2
  • adjecitve
  • Happening or existing in many places

bite

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US / baɪt /

UK / baɪt /

A2
  • noun
  • Amount of food taken into your mouth at one time
  • Wound left from being bitten
  • verb
  • (E.g. of fish) to take bait and be caught
  • To close your teeth onto something, usually to eat

construction

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US / kən'strʌkʃn /

UK / kənˈstrʌkʃən /

A2
  • noun
  • Act of building something; thing that is built
  • Something that is made using different parts
  • The way words are organized in a sentence
  • The way something is made or structured

have

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US / həv /

UK / hæv /

A1
  • verb
  • To drink, smoke, eat or use something
  • To experience the effects of something
  • To organize an event, or join in an activity
  • To own, possess, or hold something
  • To cause to happen or produce a particular effect

part

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US / pɑ:t /

UK / pɑ:rt /

A1
  • adjecitve
  • To some degree; half; not fully
  • noun
  • Division of a book
  • Ratio of something, e.g. 3 of gin, 1 of tonic
  • A line in a person's hair, made with a comb
  • Character an actor plays on stage, movie, or TV
  • Some, but not all of a specific thing
  • Role in causing something to happen
  • verb
  • To make a line in a person's hair, by using a comb
  • To move two things apart creating a space
  • To leave someone, or to break off a relationship

see

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US / si: /

UK / si /

A1
  • verb
  • To go on a date with someone
  • To predict whether something is, or will be true
  • To understand what someone says
  • To use your eyes to look at something
  • To visit a place often for sightseeing or pleasure
  • To visit or meet with someone
  • To find out by waiting or looking
  • To watch (a game, movie or TV show)

tract

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US / trækt /

UK / trækt /

B2
  • noun
  • A large stretch of land
  • System of internal body parts, e.g. the intestines
  • Piece of writing that communicates a certain view
  • Subtitles section
  • Much like their mythical namesakes, vampire bats must feast on fresh blood every two to three days, or die of starvation.
  • They seek out warm-blooded mammals, thriving off domestic livestock living in the tropical regions of South and Central America.
  • Most victims never feel a thing, and the bite itself is superficial.
  • But increasingly, bats are targeting humans, and the encounters are turning deadly.
  • The bats are blamed for rabies outbreaks in Peru, and National Geographic grantee Daniel Stryker is researching the environmental causes and extent of the disease.
  • Vampire bats are kind of the perfect storm of different ecological characteristics.
  • On the one hand, these bats are feeding on larger mammals, which are susceptible to rabies, and in order to feed on these animals, to drink their blood, they have to bite.
  • And biting is also the main route of transmission of rabies virus.
  • Stryker is surveying vampire bats from the Amazon rainforest to the farms along the valleys of the Andes Mountains.
  • Vampire bats are native to Peru, but 500 years ago, settlers imported an ideal food source, cattle.
  • And as the number of livestock increases and spreads across the country, so too does the population of vampire bats.
  • Today, large colonies thrive near areas devoted to ranching.
  • Yet despite the burgeoning bat population, it’s rare for people living in these agricultural areas to become infected with rabies.
  • Rabies is a frightening and deadly disease.
  • The classic form of the disease turns even docile creatures into aggressors that foam at the mouth.
  • But the strain found in vampire bats is different.
  • It’s known as paralytic, or dumb rabies, causing disorientation, muscle weakness, and eventually, death.
  • To learn more, he must turn the tables.
  • This time, it’s a human taking blood from a vampire.
  • Working at the Centers for Disease Control and Prevention, or the CDC in Atlanta, Stryker adds a lab strain of the rabies virus to blood samples he collected from vampire bats in Peru.
  • After an incubation period, the test results will show which bats had been exposed to the rabies.
  • Under the microscope, fluorescent green dye indicates no antibodies present, meaning the bat was free of disease.
  • But if the results come back clear, the bat has antibodies.
  • And Stryker knows the bat was exposed to rabies in the recent past.
  • So this is an important test for us because it allows us to first determine whether the virus is present or absent in a bat population.
  • And finally, we can ask them questions at the population level, specifically asking things like, as you have more livestock in a given area, do you see a higher proportion of bats that have been exposed to this virus?
  • Preliminary results indicate that vampire bats from agricultural areas may actually have a higher rate of infection than do bats from other parts of the country.
  • So, why then do so few people who live near cattle ranches fall ill with rabies, if there are so many bats around infected with the disease?
  • Stryker believes that the livestock act as a buffer.
  • Bats prefer passive herds to people, reducing the attacks on people.
  • But as vampire bat populations increase, and more livestock become infected, this could pose a greater rabies threat to people in the future.
  • The same theory may explain why human rabies is more common in Peru’s Amazon rainforest.
  • Here, development such as logging, mining, and road construction has wiped out vast tracts of habitat and reduced wildlife populations.
  • And since there’s not much livestock in this area, the bats turn to another food source, humans.
  • There may be fewer infected bats, but they bite people more frequently.
  • Could this be why the disease is far more common here than in the Andes?
  • There’s much more to learn about how widespread rabies is among the country’s bat population.
  • What we don’t know is how this disease is persisting in the vampire bats, and as a correlate of that, we don’t know where it is in vampire bats.
  • So, again, much more widespread.
  • Potentially, it’s always present in these bat populations.
  • Stryker will continue to collect data, hoping his research will eventually help predict where people will need to be vaccinated.
  • The more he learns about this frightening disease, the better the chance we may someday be able to control it.