字头A
a (an) - ad. one; any; each

able - v. having the power to do something

about - ad. almost ("about half"); of or having a relation to ("We talk about the weather.")

above - ad. at a higher place

accept - v. to agree to receive

accident - n. something that happens by chance or mistake; an unplanned event

accuse - v. to say a person is responsible for an act or crime; to make a statement against someone

across - ad. from side to side; to the other side

act - v. to do something

activist（激进分子） - n. one who seeks change through action

actor - n. someone acting in a play or show

add - v. to put (something) with another to make it larger; to say more

administration - n. the executive part of a government, usually headed by a president or prime minister

admit - v. to accept ("admitted to the United Nations"); to express one's guilt or responsibility ("He admitted that what he did was wrong.")

adult - n. a grown person

advise - v. to help with information, knowledge or ideas in making a decision

affect - v. to produce an effect on; to influence ("A lack of sleep affected the singer's performance.")

afraid - ad. feeling fear

after - ad. later; behind

again - ad. another time; as before

against - ad. opposed to; not agreeing with something

age - n. how old a person or thing is

agency - n. an organization that is part of a larger group ("an agency of the United Nations")

aggression - n. an attack against a person or country; the violation of a country's borders

ago - ad. of time past; before now

agree - v. to have the same belief as someone; to be willing to do something

agriculture - n. farming

aid - v. to help; to support; n. help, assistance

aim - v. to point a gun at; n. a goal or purpose

air - n. the mixture of gases around the earth, mostly nitrogen and oxygen, that we breathe

air force - n. a military organization using airplanes

airplane - n. a vehicle with wings that flies

airport - n. a place where airplanes take off and land

album - n. a collection of recorded music

alcohol - n. a strong, colorless liquid, usually made from grain, used as a drug or in industrial products

alive - ad. having life; not dead

all - ad. everything; everyone; the complete amount

ally - n. a nation or person joined with another for a special purpose

almost - ad. a little less than completely

alone - ad. separated from others

along - ad. near or on ("along the road")

already - ad. before now; even now

also - ad. added to; too

although - conj. even if it is true that

always - ad. at all times; every time

ambassador - n. a nation's highest diplomatic representative (to another government)

amend - v. to add to or to change (a proposal or law)

ammunition（军火） - n. the bullets or shells fired from guns

among - ad. in or part of (a group)

amount - n. the number, size or weight of anything

anarchy - n. a lack of order; lawlessness

ancestor - n. a family member from the past

ancient - ad. very old; long ago

and - conj. also; in addition to; with

anger - n. a strong emotion against someone or something

animal - n. a living creature that moves, such as a dog or cat

anniversary - n. a yearly celebration or observance of an event that happened in the past

announce - v. to make known publicly; to declare officially

another - ad. one more; a different one

answer - n. a statement produced by a question; v. to make a statement after being asked a question

any - ad. one or more of no special kind

apologize - v. to express regret for a mistake or accident for which one accepts responsibility

appeal - v. to take to a higher court, person or group for a decision; to call on somebody for help

appear - v. to show oneself; to come into sight; to seem

appoint - v. to name; to choose ("appoint a judge")

approve - v. to agree with; to agree to support

archeology（考古学） - n. the scientific study of past human life and activities

area - n. any place or part of it

argue - v. to offer reasons for or against something; to dispute; to disagree

arms - n. military equipment; weapons

army - n. military ground forces

around - ad. on every side (of)

arrest - v. to seize a person for legal action; to take as a prisoner

arrive - v. to come to a place, especially at the end of a trip

art - n. expressions or creations by humans, such as paintings, music, writing or statues

artillery - n. big guns

as - conj. equally ("as fast as"); when; while

ash - n. the part left after something burns

ask - v. to question; to say something is wanted ("We ask the teacher questions every day.")

assist - v. to help

astronaut - n. a person who travels in space

astronomy - n. the scientific study of stars and the universe

asylum（避难） - n. political protection given by a government to a person from another country

at - prep. in or near ("at the edge"); where ("look at"); when ("at noon")

atmosphere - n. the gases surrounding any star or planet

attach - v. to tie together; to connect

attack - n. a violent attempt to damage, injure or kill; v. to start a fight

attempt - v. to work toward something; to try; to make an effort

attend - v. to be present at

automobile - n. a vehicle with wheels used to carry people; a car

autumn - n. the time of the year between summer and winter

average - n. something (a number) representing the middle; ad. common; normal

avoid - v. to stay away from

awake - ad. not sleeping

award - n. an honor or prize for an act or service

away - ad. not near

字头B
baby - n. a newly born creature

back - n. the part behind the front; ad. the other way from forward

bad - ad. wrong; acting against the law; not good

balance - v. to make two sides or forces equal

ball - n. something round

balloon - n. a device of strong, light material that rises when filled with gas lighter than air

ballot（选票） - n. a piece of paper used for voting

ban - v. to not permit; to stop; n. an official restriction

bank - n. an organization that keeps and lends money

bar（禁止） - v. to prevent or block

barrier - n. anything that blocks or makes an action difficult

base - n. a military center; v. to establish as a fact ("Her research was based on experiments.")

battle - n. a fight between opposing armed forces

be - v. to live; to happen; to exist

beat - v. to hit again and again

beauty - ad. that which pleases the eye, ear or spirit

because - prep. for the reason that ("He left because he was sick.")

become - v. to come to be

bed - n. a sleeping place

before - prep. earlier

begin - v. to do the first part of an action; to start

behind - ad. at the back of; in back of

believe - v. to think; to feel sure of; to accept as true; to trust

bell - n. an instrument that makes a musical sound ("a church bell")

belong - v. to be owned by; to be a member of

below - ad. lower than

best - ad. the most good

betray（背叛） - v. to turn against; to be false to

better - ad. more good than

between - ad. in the space or time that separates; from one to the other ("talks between two nations")

big - ad. of great size; not small

bill（法案） - n. a legislative proposal

biology - n. the scientific study of life or living things in all their forms

bird - n. a creature that flies

bite - v. to cut with the teeth

black - ad. dark; having the color like that of the night sky
blame - v. to accuse; to hold responsible

blanket - n. a cloth cover used to keep warm

bleed - v. to lose blood

blind - ad. not able to see

block （阻碍）- v. to stop something from being done; to prevent movement

blood - n. red fluid in the body

blow - v. to move with force, as in air ("The wind blows.")

blue - ad. having the color like that of a clear sky

boat - n. something built to travel on water that carries people or goods

body - n. all of a person or animal; the remains of a person or animal

boil - v. to heat a liquid until it becomes very hot

bomb - n. a device that explodes with great force; v. to attack or destroy with bombs

bone - n. the hard material in the body

book - n. a long written work for reading

border - n. a dividing line between nations

born - v. to come to life; to come into existence

borrow - v. to take as a loan

both - ad. not just one of two, but the two together

bottle - n. a container, usually made of glass, to hold liquid

bottom - ad. the lowest part of something

box - n. something to put things into; a container, usually made of paper or wood

boy - n. a young male person

boycott（地质、断交） - v. to refuse to take part in or deal with

brain - n. the control center of thought, emotions and body activity of all creatures

brave - ad. having no fear

bread - n. a food made from grain

break - v. to divide into parts by force; to destroy

breathe - v. to take air into the body and let it out again

bridge - n. a structure built over a waterway, valley or road so people and vehicles can cross from one side to the other

brief - ad. short; not long

bright - ad. giving much light; strong and clear in color

bring - v. to come with something

broadcast - v. to send information, stories or music by radio or television; n.a radio or television program

brother - n. a male with the same father or mother as another person

brown - ad. having the color like that of coffee

budget（预算） - n. a spending plan

build - v. to join materials together to make something

building - n. anything built for use as a house, factory, office, school, store or place of entertainment

bullet - n. a small piece of metal shot from a gun

burn - v. to be on fire; to destroy or damage by fire

burst - v. to break open suddenly

bury - v. to put into the ground and cover with earth

bus - n. a public vehicle to carry people

business - n. one's work; buying and selling to earn money; trade

busy - ad. doing something; very active

but - conj. however; other than; yet

buy - v. to get by paying something, usually money by - conj. near; at; next to ("by the road"); from ("a play by William Shakespeare"); not later than ("by midnight")