Besu贝苏
bev.有;在;是;到达;拜访
be ground ed upon以 ... 为基础
be debilitated by因 ... 而衰弱
be in full vigour精力旺盛
be slightly built(建筑物等)不牢固的; (体格)瘦弱的, 苗条的
beharioral theory行为理论
be short of coins钱荒
be strong for sth坚决赞成某事物
be at the root ofvt.是 ... 的根本
be unbecoming for对
be neatly dressed衣着整洁