artificial adj. 人工的，人造的，假的 (artificial rain/人工降雨artificial satellite/人造卫星); artist n. 艺术家，美术家; as adv. 同样地，相同地prep. 被看作，被认为是，像……(指处于某种状态、性质、情况、工作等之中); conj. (用于比较)与……一样，当，由于，因为(as...as.../和……一样……such as /诸如; as it were/或者说as yet /迄今，到目前为止
as you know /正如你知道的; as if(= as though)/ 好像，好似as long as (= so long as)/只要as for/to/关于;至于); asia n. 亚洲; aside adv. 在旁边，在一边(aside from/ 除了……. 以外); asleep adj. [作表语] 睡着的(fall asleep/入睡); aspect n. 模样，面貌，方面one aspect of the problem /问题的一个方面; a house with a southern aspect /朝南的房子); assemble v. 集合，聚集，装配(机器等) (assembly line/装配线);
assess v. 估定(财产，价值等)，评估(人物、工作等)( damages were assessed at 1000 rmb. / 损失估计达一千元人民币。); asset n. [常用复]资产;财产; assist v. 帮助，支援(assist sb. with a task/帮助某人做某事; assist sb. in doing sth. / 帮助某人做某事 ); associate v. 结交，联合，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; associate with/和……来往，和……共事; 同……联合);
association n. 联合, 联系, 联盟, 协会, 社团; assume v. 假定，承担，呈(形式，姿态，位置) (assume responsibility/负责，承担责任assume a new aspect/呈现新的面貌); astonish v. 使吃惊 (be astonished at sth. /对……感到惊讶, astonish sb. /使……感到惊讶); astronaut n. 太空人，宇航员; at prep. [位置，场所，地点，时间]在……时，在……中，在……方面，向，表示以..速度，价格等;
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 end of the street/在街的尽头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at one’s convenience/在某人方便时at high pressure/在高压下 aim at.../对准……throw...at.../朝……扔……
