74. benefit (from) 受益,得到好处.　­

73. believe in(=have faith or trust in; consider sth.sb. to be true) 相信,依赖,信仰.　­

72. on behalf of (=as the representative of) 以…名义　­

71. begin with 以…开始. to begin with (=first of all) 首先, 第一(经常用于开始语)　­

70. beat…at 在…运动项目上打赢　­

69. on the basis of 根据…, 在…基础上　­

68. be based on　upon 基于　­

67. behind one’s back 背着某人(说坏话)　­

66. turn one’s back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背弃,抛弃　­　­

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　­