C级核心词汇推荐: assembly n. 集合, 装配, 集会(assembly line/装配线); assess v. 评估(财产, 价值, 人物、工作等); (assess – evaluate – value评估) assist v. (在某方面)帮助,援助,协助 ((assist sb. in doing sth/to do sth/在…方面帮助某人)) assistant n. 助手, 助理(assistant engineer/助理工程师. assistant professor/副教授). associate v. 结交, 由...联想到..., 把...联系起来(associate one thing with another/把某一事与另一事联系起来. ...be associated with sth./...和...有关/...和...有联系): association n. 联合,协会, 社团: assume v. 假设(assume – suppose ),承担(assume – take on - acccept), 呈(态度, 姿态, 位置) (assume new duties/ 承担新的职务. assume office/就职. assume responsibility/负责, 承担责任). assure v. 保证 (assume - ensure) ,使安心,让…放心 (assure sb. of/that…/向某人保证…) astonish v. 使吃惊(astonish – surprise –shock)(be astonished at sth. /对…感到惊讶). astronaut n. 宇航员 at prep.[位置, 场所, 地点,时间]在…时,在…中,在…方面,向,(表示速度,价格等)以(arrive at…/到达…. at my uncle s/在我叔父家.at the foot[top] of the mountain / 在山脚下[顶上]. at the meeting/在会议上. at ten o clock/ 在十点钟. at (the age of) forty/在 40 岁的时候. at the beginning of the month/ 在月初. at Christmas/在圣诞节. aim at…/对准... throw …at …/朝…扔….be pleased at…/对…感到高兴.be surprised [frightened] at …/听到…而吃惊. at one s request/应某人的请求. at the rate/speed of …/以每小时..速度). athlete: n. 运动员 Atlantic adj.大西洋的;大西洋沿岸的(the Atlantic Ocean /大西洋). atmosphere n. 大气, 空气, 气氛. attack n./v. 进攻, 疾病)侵袭,发作(a heart attack /心脏病发作). attach v. 贴上,系上,缚上(attach… to … 把…贴/系在…上面) attempt n. (常与at, on, to连用)努力, 尝试v. (常与to连用)企图, 尝试 (attempt to do sth./make an attempt to do sth. /试图做…). attend v. 注意, 出席(at), 参加, 上(学, 教堂) ( attend school /上学. attend a lecture /听讲课. attend (at) a wedding /出席婚礼. be attended by/ 由...陪同. 由...照料). attention n.注意, 关心, 关注, 注意力( pay attention to ../注意..). attitude n.态度, 看法, 意见(attitude to/towards…/对…的态度, take [assumed] an attitude of 取…态度). attract vt. 吸引(attract –appeal to), 诱惑(attract one’s attention/引起某人注意). attractive adj. 有吸引力的(attractive – appealing ), 漂亮的(attractive – beautiful – pretty ). attribute vt. 把...归因于(to)..., n.属性, 特质, 标志(attribute ..to ../ 把...归因于). audience n. 听众, 观众, 读者(a large audience/很多观众). August n.八月(略作Aug). aunt n. 伯母, 婶母, 舅母, 阿姨. Australia n. 澳大利亚,澳洲: author n. 作家, 著者(best author畅销书作者. joint author/合著者). authority n. 权威, 权力, 权势, [pl.]当局, 负责人. automatic adj.自动的,机械的. automobile n.汽车,小汽车. autumn n. 秋, 秋季(美国普通称fall) (in autumn/在秋天. in (the)late autumn/在晚[深]秋). available adj.可用到的, 可利用的, 有用的, 有空的.