55. assure sb. of sth. (=try to cause to believe or trust in sth.) 向…保证, 使…确信.56. attach(to) (=to fix, fasten; join) 缚, 系 ,结57. make an attempt at doing sth. (to do sth.) 试图做…58. 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59. attitude to/ toward …对…的态度.看法60. attribute…to…(=to believe sth. to be the result of…)把……归因于……, 认为……是……的结果 61. on the average (=on average, on an average) 平均62. (be) aware of (=be conscious of , having knowledge or consciousness)意识到,知道.63. at the back of (=behind) 在…后面64. 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.65. 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66. turn one's back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背弃,抛弃67. behind one's back 背着某人(说坏话)68. be based on / upon 基于69. on the basis of 根据…, 在…基础上70. beat…at 在…运动项目上打赢71. begin with 以…开始. to begin with (=first of all) 首先, 第一(经常用于开始语)72. on behalf of (=as the representative of) 以…名义73. believe in(=have faith or trust in; consider sth./sb. to be true) 相信,依赖,信仰.74. benefit (from) 受益,得到好处.75. for the benefit of 为了…的利益(好处) 76. for the better 好转77. get the better of (=defeat sb.) 打败, 胜过.78. by birth 在出生上,论出身,按血统 at birth 在出生时; give birth to 出生79. blame sb. for sth. 因…责备某人 . blame sth. on sb. 把…推在某人身上80. in blossom开花(指树木) be in blossom开花(强调状态) come into blossom开花(强调动作)81. on board 到船上, 在船上, 上火车或飞机82. boast of (or about) 吹嘘83. out of breath 喘不过气来84. in brief(=in as few words as possible)简言之85. in bulk 成批地,不散装的86. take the floor 起立发言 87. on business 出差办事.88. be busy with sth.于某事 。 be busy doing sth. 忙于做某事89. last but one 倒数第二.90. but for (=without) 要不是. 表示假设91. buy sth. for…money 用多少钱买92. be capable of 能够, 有能力 be capable of being +过去分词:是能够被…的93. in any case(=for love or money, at any rate, at any price, at any cost, whatever happens; anyhow)无论如何94. in case (=for fear that) 万一;95. in case of (=in the event of)如果发生…万一 in the case of 至于…, 就…而言96. in no case在任何情况下都不(放句首倒装句)97. be cautious of 谨防98. center one's attention on(=focus one's attention on) 把某人的注意力集中在…上99. be certain of (=be sure of) 有把握, 一定.100. for certain of (=for sure )肯定地,有把握地