A

　　accept - v. to agree to receive　接受

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

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

　　against someone　指责

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

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

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

　　adult - n. a grown person　成人

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

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

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

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

　　agriculture - n. farming　农业

　　air force - n. a military organization using airplanes 空军

　　album - n. a collection of recorded music 歌集

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

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

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

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

　　ammunition - n. the bullets or shells fired from guns　弹药

　　anarchy - n. a lack of order; lawlessness　无政府状态

　　ancestor - n. a family member from the past　祖先

　　ancient - ad. very old; long ago　远古的

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

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

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

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

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

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

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

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

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

　　arms - n. military equipment; weapons　兵器

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

　　artillery - n. big guns　炮

　　assist - v. to help　帮助

　　astronaut - n. a person who travels in space　宇航员

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

　　asylum - n. political protection given by a government to a person from another country　政治庇护

　　atmosphere - n. the gases surrounding any star or planet　大气层

　　attach - v. to tie together; to connect　系上；连接

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

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

　　attend - v. to be present at　出席

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

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

　　avoid - v. to stay away from　避免

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

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