| 51. arrange for sb./sth. to do sth. 安排…做…­ 
 52. arrive on 到达; arrive at 到达某地(小地方);得出,作出; arrive in 到达某地(大地方);­
 
 53. be ashamed of (=feel shame, guilt or sorrow because of sth. done) 以…为羞耻­
 
 54. assure sb. of sth. (=try to cause to believe or trust in sth.) 向…保证, 使…确信。­
 
 55. attach(to) (=to fix, fasten; join) 缚, 系 ,结­
 
 56. make an attempt at doing sth. (to do sth.) 试图做…­
 
 57. attend to (=give one’s attention, care and thought)注意,照顾;attend on(upon)(=wait upon, serve, look after) 侍候,照料­
 
 58. attitude to/ toward …对…的态度。看法­
 
 59. attribute…to…(=to believe sth. to be the result of…)把.。归因于.., 认为.。是.。的结果­
 
 60. on the average (=on average, on an average) 平均­
 
 61. (be) aware of (=be conscious of , having knowledge or consciousness)意识到,知道。­
 
 62. at the back of (=behind) 在…后面­
 
 63. in the back of 在…后部(里面); on the back of 在…后部(外面); be on one’s back(=be ill in bed) 卧病不起。­
 
 64. at one’s back(=supporting or favoring sb.) 支持,维护; have sb. at one’s back 有…支持, 有…作后台­
 
 65. turn one’s back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背弃,抛弃­
 
 66. behind one’s back 背着某人(说坏话)­
 
 67. be based on / upon 基于­
 
 68. on the basis of 根据…, 在…基础上­
 
 69. beat…at 在…运动项目上打赢­
 
 70. begin with 以…开始. to begin with (=first of all) 首先, 第一(经常用于开始语)­
 
 71. on behalf of (=as the representative of) 以…名义­
 
 72. believe in(=have faith or trust in; consider sth./sb. to be true) 相信,依赖,信仰。­
 
 73. benefit (from) 受益,得到好处。­
 
 74. for the benefit of 为了…的利益(好处)­
 
 75. for the better 好转­
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