61.turn one’s back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背弃,抛弃
62.behind one’s back 背着某人(说坏话)
63.be based on / upon 基于
64.on the basis of 根据…, 在…基础上
65.beat…at 在…运动项目上打赢
66.begin with 以…开始. to begin with (=first of all) 首先, 第一(经常用于开始语)
67.on behalf of (=as the representative of) 以…名义
68.believe in(=have faith or trust in; consider sth./sb. to be true) 相信,依赖,信仰.
69.benefit (from) 受益,得到好处.
70.for the benefit of 为了…的利益(好处)
71.for the better 好转
72.get the better of (=defeat sb.) 打败, 胜过.
73.by birth 在出生上,论出身,按血统 at birth 在出生时; give birth to 出生
74.blame sb. for sth. 因…责备某人 blame sth. on sb. 把…推在某人身上
75.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)
76.on board 到船上, 在船上, 上火车或飞机
77.boast of (or about) 吹嘘
78.out of breath 喘不过气来
79.in brief(=in as few words as possible)简言之
80.in bulk 成批地,不散装的
