1. act on 奉行,按照…行动; act as 扮演; act for 代理

　　2. adapt oneself to(=adjust oneself to) 使自己适应于

　　3. adapt…(for) (=make sth. Suitable for a new need) 改编, 改写(以适应新的需要)

　　4. in addition (=besides) 此外, 又, 加之

　　5. in addition to(=as well as, besides, other than)除…外

　　6. to advantage 有利的,使优点更加突出地.

　　7. have an advantage over 胜过. have the advantage of 由于…处于有利条件have the advantage of sb.知道某人所不知道的事

　　8. take advantage of (=make the best of, utilize, make use of, profit from, harness)利用.

　　9. agree with 赞同(某人意见) agree to 同意

　　10. in agreement (with) 同意, 一致

　　11. ahead of 在…之前, 超过…;……………. ahead of time 提前.

　　12. in the air 1)不肯定, 不具体. 2)在谣传中.

　　13. above all (=especially, most important of all) 尤其是, 最重要的.

　　14. in all (=counting everyone or everything, altogether) 总共, 总计

　　15. after all 毕竟,到底; (not) at all 一点也不; all at once(=suddenly)突然; once and for all 只此一次; above all 最重要的; first of all 首先; all in all 大体上说; be all in 累极了; all but 几乎.

　　16. adhere to (=abide by, conform to, comply with, cling to, insist on, pe rsist in, observe, opinion, belief ) 粘附; 坚持, 遵循

　　17. adjacent(=next to, close to) 毗邻的, 临近的

　　18. adjust..(to) (=change slightly)调节; 适应;

　　19. admit of (=be capable of, leave room for) …的可能，留有…的余地.

　　20. in advance (before in time) 预告, 事先.