61. on the average (=on average, on an average) 平均
62. (be) aware of (=be conscious of , having knowledge or consciousness)意識到,知道.
63. at the back of (=behind) 在…後面
64. in the back of 在…後部(裡面); on the back of 在…後部(外面); be on one’s back(=be ill in bed) 臥病不起.
65. at one’s back(=supporting or favoring sb.) 支持,維護; have sb. at one’s back 有…支持, 有…作後台
66. turn one’s back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背棄,拋棄
67. behind one’s back 背著某人(說壞話)
68. be based on / upon 基於
69. on the basis of 根據…, 在…基礎上
70. beat…at 在…運動項目上打贏
71. begin with 以…開始. to begin with (=first of all) 首先, 第一(經常用於開始語)
72. on behalf of (=as the representative of) 以…名義
73. believe in(=have faith or trust in; consider sth./sb. to be true) 相信,依賴,信仰.
74. benefit (from) 受益,得到好處.
75. for the benefit of 為了…的利益(好處)
76. for the better 好轉
77. get the better of (=defeat sb.) 打敗, 勝過.
78. by birth 在出生上,論出身,按血統 at birth 在出生時; give birth to 出生
79. blame sb. for sth. 因…責備某人 blame sth. on sb. 把…推在某人身上
80. in blossom開花(指樹木) be in blossom開花(強調狀態) come into blossom開花(強調動作)