1. a big headache令人頭痛的事情
2. a fraction of -部分
3. a matter of concern焦點
4. aseriesof一系列,一連串above all首先尤其是
5. absent from不在缺席
6. abundant in富于
7. account for解釋
8. accuse sb. of sth.控告
9. add to增加(add up to)
10. afterall 畢竟究竟
11. agree with同意
12. ahead of time /schedule提前
13. anead of在..之前(anhead of time提前)
14. alien to與..相反
15. all at once突然,同時
16. all but幾乎除了...都
17. all of a sudden突然
18. all over again再一次,重新
19. all over遍及
20. all right令人滿意的;可以
21. all the same仍然照樣的
22. all the time一直始終
23. angry with sb. at/about sth.生氣,憤怒
24. anxious about/for憂慮擔心
25. anything but根本不
26. apart from除...外(有/無)
27. appeal to吸引,申訴,請求
28. applicable to适用于
29. apply to适用
30. appropriate for/to适當,合适
31. approximate to近似,接近
32. apt at聰明,善于
33. apt to易于
34. around the clock夜以繼日
35. as a matter of fact實際上
36. as a result(of)因此由于
37.as a rule通常照例
38. as far as ...be concerned就...而言
39. as far as遠至到.程度
40. as fllows如下
41. as for至于,關于
42. as good as和...幾乎樣
43. as if好像防腐
44. as regards關于,至于
45. as to至于關于
46. as usual像平常一樣,照例
47. as well as除... 外(也),即..又
48. as well同樣也,還
49. ashamed of羞愧,害臊
50. aside from除...外(還有)
51. ask for the moon異想天開
52. at a Ioss茫然,不知所措
53. at atime一次,每次
54. at all costs不惜一切代價
55. at all events不管怎樣,無論如何
56. at all times随時,總是
57. at all絲毫(不),一點也不
58. at any rate無論如何,至少
59. at best充其量,至多
60. at first sight乍一看,初看起來
61. at first最初,起先
62. at hand在手邊,在附近
63. at heart内心裡,本質上
64. at home在家,在國内
65. at intervals不時,每隔..
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