ascertain vt. 确定,探知ascetic adj. 苦行的aspect n. 方面,样子,外表asperse v. 诽谤aspersion n. 诽谤aspiration n. 热望,渴望aspire vi. 热望assail vt. 猛击,绝然面对assassin n. 刺客assassinate vt. 暗杀,行刺assault v. 袭击,攻击assemble vt. 聚集assembly n. 集会assert v. 断言,宣称,维护assess vt. 估计asset n. 财产,财富assiduous adj. 勤勉的assign vt. 分配,指派assimilate v. 吸收assist v. 补助associate v. 联合,伙伴association n. 协会,关联assuage vt.缓和assumption n. 就职,假设assure vt. 使确信,向保证astonish vt. 使惊讶astonished adj. 惊讶的astound v. 使惊异astronomy n. 天文学astute adj. 机敏的,狡猾的atheism n. 无神论athlete n. 运动员atmosphere n. 气氛,大气层atom n.原子attachment n.连接物,附件attainment n. 成就attend vt. 参加attendant n. 侍者,服务人员attorney n. 代理人,辩护律师at`tribute v. 归因于`attribute n. 性质attrition n. 磨损audience n.观众audit n. 审查,查账audition n. 试听,面试auditor n.审计员,旁听着auditorium n. 大礼堂,观众席augment v. 增大,增加aura n. 气味,气氛auspices n. 前兆,赞助,保护,主办auspicious n. 吉兆的,幸运的austerity n. 节俭,严峻authentic adj. 可靠,又根据,真实的authoritative adj. 权威性的,官方的authority n. 权威authorize v. 授权autocrat n. n. 自治权available adj. 可用的avalanche n. v. 雪崩avarice n. 贪婪,贪财avaricious adj. 贪婪的,贪心的average adj. 一般的,平均的aversion n. 厌恶avert v. 转移,避免,防止aviator n. 飞行家,飞行员avid adj. 热切的,贪婪的avoid vt. 避免。回避,躲开avow v. 公开,承认awe n. v. 敬畏awkward adj. 笨拙的,尴尬的axis n.轴baby-sit v. 看管,照顾婴儿backward adj. 退步的,相反的baggage n. 行李bait n. 诱饵balance n. 平衡bald adj. 秃头的,光秃的balk v. 妨碍ballot n. 选票balmy adj. 温和的,芳香的ban v. 禁止,禁令bandit n. 强盗banish vt. 驱逐出境bankruptcy n. 破产banquet n. 宴会bar n. n. 野蛮人bare adj。露出,空的barely adv. 仅仅barometer n. 气压计barren n. 贫瘠的,不孕的barricade n. 障碍物barrier n. 栅栏,屏障,障碍barter n.易货,易货贸易bashful adj. 害羞的,胆小的basin n. 盆地bask vt. 取暖,晒太阳,沐浴于baste vt. 殴打,公开责骂batter v. 击破,捣坏,炮击bear v. 具有,带有,支撑beat adj. 疲倦的becoming adj. 合适的,相称的beforehand adv. 事先的befuddle vt. 使混乱beget vt. 引起,产生begrudge vt. 羡慕,嫉妒beguile vt. 欺骗,消遣behave v. 举止端正,表现,运转behaviour n. 行为belie v. 掩饰believer n. 信徒belittle vt. 轻视belligerent adj. 好战的,交战的benefactor n. 恩人,行善的人,捐助人(女性,benefactress) beneficial adj. 有益的beneficiary n.受益者,受惠着benefit n. 利益,对有益处benevolent adj. 慈善的benign adj. 亲切的,良好的bent n. 倾向,爱好bequest n. 遗产,遗传berate vt. 痛骂bereave vt. 剥夺beset v. 包围besides adj. 除了besiege vt. 围,包围bestow v. 赠与,利用betray vt. 背叛,泄露beverage n. 饮料bewilder vt. 迷惑,把弄糊涂bias v. 偏见,使偏离bicker v. 争吵bidding n. 邀请,投标,命令,要求bigoted adj. 固执己见的bill n. 钞票,账单,法案biochemistry n. 生物化学bizarre adj. 古怪的blackmail vt. 勒索blame vt. 谴责bland adj.无刺激性的blast n. 一阵,爆破bleach v. 去色,漂白, 漂白剂bleak adj. 荒凉的bleed v. 流血blemish vt. 玷污blend v.n. 混合blessed adj. 愉快的,神圣的.