adolescent (尤指16岁以下的)青少年 a film aimed at adolescents

advance 使向前移动 advance a chessman

advantage 有利条件，优点 Sitting Presidents hold built-in advantages when seeking another term.

adverse 不友好的，敌对的 She felt adverse to her husband’s friends.

advocate 拥护，提倡，主张 advocate self-defence

aesthetic 美学的，艺术的，审美 an aesthetic theory

affliliate 使隶属(或附属)于，使成为会员 a government affiliated company

affirm 断言，申明 affirm the truth of a statement

aggravate 加重，加剧，恶化 aggravate the declining economy

aggressive 侵犯的，侵略的 an aggressive weapon

agitate 搅动(液体等) The machine agitated the mixture.

alarm 惊恐，忧虑 The bandits scattered in alarm.

alert 警惕的，留神的 In our reading we should always be alert for new usages.

allege 断言，宣称 The newspaper alleges the mayor’s guilt.

allocate 分配，分派，把...拨给 allocate funds for new projects

allied 结盟的，有关联的 allied nations

allowance 津贴，补贴，零用钱 a housing allowance

alternate 交替，轮流 Night and day alternate.

amateur (艺术，科学等的)业余爱好者 an amateur golfer

ambiguous 含糊不清的，模棱两可的 an ambiguous answer

amend 修改，修订 amend the spelling in sb.’s paper

amuse 逗乐，逗笑，给...提供娱乐(或消遣) The clown at the circus amused the children.