1.abide by(=be faithful to ; obry)忠于；遵守。

2.be absent from....缺席，不在

3.absence or mind(=being absent-minded)心不在焉

4.absorb(=take up the attention of)吸引...的注意力（被动语态）：be absorbed in全神贯注于...近：be engrossed  in；be lost in ； be rapt in；be concerntrated on ;   be focused on ; be centered on

5.(be) abundant in(be rich in; be well supplied with)     富裕，富有

6.access（to）（不可数名词）能接近，进入，了解

7.by accident(=by chance ,accidentally)偶然地，意外.Without           accident（=safely）安全地

8.of one's own accord(=wihtout being asked;willingly; freely)自愿地，主动地

9.in accord with与...一致. out of one's accord with同... 不一致

10.with one accord (=with everybody agreeing)一致地

11.in accordance with(=in agreement with)依照，根据

12.on one's own account 1)为了某人的缘故，为了某人自己的利益2)(=at one's own risk)自行负责3)(=by oneself)依靠自己  on account赊账；on account of因为； on no account 不论什么原因也不；of...account有...重要性.

13.take...into account(=consider)把...考虑进去

14.give sb.an account of 说明，解释（理由）

15.account for(=give an explanation or reason for)解释，说明

16.on account of(=because of)由于，因为.

17.on no account(=in no case，for no reason)绝不要，不论如何不要（放句首时句子要倒装）

18.accuse...of...(=charge...with;blame sb. for sth，blame sth on sb. ; complain about)指控， 控告

19.be accustomed to(=be in the habit of，be used to)习惯于

20.be acquainted with(=to have knowledge of)了解；   (=to have met socially)熟悉

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

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

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

24.in addition(=besides)此外，又，加之

25.in addition to(=as well as, besides, other than)除...之外

26.adhere to(=abide by，confrom to,comply with,cling to,insist on,persist in,observe,opinion,belief)粘附；坚持，遵循

27.adjacent(=next to，close to)毗邻的，临近的

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

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

30.in advance (before in time)预告，事先.