B:
Bad excuses are worse than none. 狡辩比不辩护还糟
Barking dogs seldom bite. 吠犬不咬人
Beauty and folly are often companions. 美貌和愚蠢常结伴
Beauty is but skin-deep. 美丽只是外表罢了
Beggars' bags are bottomless. 乞丐不知足
Be just before you are generous. 先还债，后慷慨
Best is cheapest. 好货最便宜
Better buy than borrow. 买比借好
Better early than late. 宁早勿晚
Better go to heaven in rags than to hell in embroidery. 宁可空而有志，不可富而失节
Better late than never. 迟做总比不做好
Better lose the saddle than the horse. 宁可丢鞍，不可失马
Better to wear out than rust out. 与其锈坏，不如用坏
Between two stools you fall to the ground. 脚踩两条凳，早晚要坠地（意同：脚踏两条船，两头要落空）
Birds of a feather flock together. 物以类聚，人以群分
Blessed is he that expects nothing, for he shall never be disappointed. 无奢望者有福，因其永不失望。
Blood is thicker than water. 血比水浓（意指：亲人总比外人亲）
Books and friends should be few but good. 买书如交友，必须少而精
Brevity is the soul of wit. 言以简洁为贵