1. a host of 大量 2. a test for 检测目的 3. a test on 对……进行测试4. a test with 检测手段 5. above all 最重要的；首先 6. according to 根据7. achieve equilibrium 取得平衡 8. achieve one's purpose 达到目的 9. achieve success 获得成功 10. achieve victory 获得胜利 11. act on 遵照...行动；作用于 12. act out 表演出来 13. add up to 总计，合计 14. add...to... 把…...加到…...15. adhere to 坚持，奉行 16. after all 毕竟，终究17. agree on 对……取得一致意见 18. agree to 同意，赞成 19. agree with sb. 同意某人的话 20. along with 和......一起21. alternate (with) 交替 22. amount to 合计；共计23. an equal to 与…(地位)相同的人/物 24. and yet 然而 25. anything but 一点也不 26. anything like 像……那样的东西 27. anywhere near 接近于 28. apart form 除……之外尚有29. apply to 向……申请；适用于 30. appreciation of 对……的欣赏/赞赏 31. argue against 反对 32. as a result of 作为……的结果；由于 33. as a result 结果；因此 34. as a whole 作为一个整体，整个看来 35. as far as… 就……而言 36. as for 至于，关于 37. as if 好像，仿佛 38. as soon as 一......就...... 39. as though 好像，仿佛 40. as to 至于，关于 41. as well 也 42. as yet 迄今，到目前为止 43. aside from 除......之外 44. associate…with… 把……和......联系起来45. association with 与……的交往/联合 46. at a disadvantage 处于不利地位 47. at a loss 不知所措 48. at a time 每次，一次 49. at all 丝毫，根本50. at any moment 随时 51. at first 首先，最初52. at large 未被捕获的，自由行动的，详尽的 53. at last 终于，最终54. at least 至少 55. at length 最终，详细地 56. at most 最多 57. at no time 从不，决不 58. at one time 曾经59. at the cost of 以……为代价 60. at the least 至少，无论如何61. at times 有时，间或 62. at…speed 以……的速度63. attend on 照顾，侍候 64. attribute…to......
