69. begin with 以…開始. to begin with (=first of all) 首先, 第一(經(jīng)常用于開始語)

68. beat…at 在…運(yùn)動(dòng)項(xiàng)目上打贏

67. on the basis of 根據(jù)…, 在…基礎(chǔ)上

66. be based on / upon 基于

65. behind one’s back 背著某人(說壞話)

64. turn one’s back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背棄,拋棄

63. at one’s back(=supporting or favoring sb.) 支持,維護(hù); have sb. at one’s back 有…支持, 有…作后臺(tái)

62. 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) 臥病不起.

61. at the back of (=behind) 在…后面

60. (be) aware of (=be conscious of , having knowledge or consciousness)意識(shí)到,知道.