l ascribe… to

　　He ascribed his failure to objective conditions.

　　l aspiring 热心的, 积极的, 有抱负的

　　assemble v 集合 聚集

　　semble

　　assert

　　l associate v 使//发生联系 交往

　　1. She associated happiness with having money.

　　2. Don't associate with dishonest boys

　　assorted

　　assortment

　　l assume vt. 假定,设想,承担

　　I assumed you can speak French fluently

　　我以为你能讲流利的法语

　　I made a mistake and I will assume responsibility for it

　　l assumption

　　The theory is based on a series of wrong assumptions.

　　assure

　　astonishing

　　l astute a. 机敏的,狡猾的

　　He is astute in business

　　at intervals

　　at one session

　　at the cutting

　　edge of

　　l atomization

　　attach

　　attached

　　attachment

　　l attain v. 达到,获得

　　The country attained its independence in 1972.

　　attainment n 成就 造诣

　　a man of high attainments 有很高造诣的人

　　attire n 服装 穿上去很累

　　attribute to

　　auditorium

　　l aurora 黎明的女神, 极光

　　auroral light

　　automated

　　available avigation

　　aviation avigation navigate

　　avocational

　　vocational

　　awareness

　　Youth glided past without our awareness

　　awkwardly

　　B

　　backdrop

　　ballet

　　l balmy

　　l barb

　　Barbed wire

　　barge tug boat

　　bark n. 树皮, 吠声

　　barn

　　barren

　　barrier

　　l barter n/v

　　barter economy. 物物交换经济

　　barter rice for textiles 用大米换取纺织品

　　We bartered for furs with tobacco and rubber.

　　我们用烟草和橡胶换取毛皮。

　　basement

　　basin

　　be characterized by

　　be taken by

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