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);

（编辑：何莹莹）