Bind the sack before it be full. 做事应适可而止。

Birds of a feather flock together. 物以类聚，人以群分。Birth is much, but breeding is more. 出身固然重要，教养更且重要。

Bite off more than one can chew. 贪多咽不下。

Bite the hand that feeds one. 恩将仇报。

Bitter pills may have wholesome effects. 良药苦口利於病。Blind men can judge no colours. 不宜问道於盲。Blood is thicker than water. 血浓於水。

Bread is the staff of life. 民以食为天。

Brevity is the soul of wit. 言以简洁为贵。

Business before pleasure. 事业在先，享乐在后。

Business is business. 公事公办。

By doing we learn. 经一事，长一智。

By falling we learn to go safely. 吃一堑，长一智。

By other's faults, wise men correct their own. 他山之石，可以攻玉。

By reading we enrich the mind; by conversation we polish it. 读书可以使我门的思想充实，谈话使其更臻完美

A bad conscience is a snake in one's heart. 做贼心虚。

A bird in the hand is worth two in the bush. 双鸟在林不如一鸟在手。

A bird is known by its note, and a man by his talk. 闻其歌知其鸟，听其言知其人。

A blind man who leans against a wall imagines that it's the boundary of the world. 坐井观天。

Absence sharpens love, presence strengthens it. 相聚爱益切，离别情更深。

A burnt child dreads the fire. 一朝被蛇咬，十年怕井绳。

Accidents will happen. 天有不测风云。

A clean hand wants no washing. 身正不怕影子斜。 A clear conscience is a soft pillow. 问心无愧，高枕无忧。

A clear conscience is a sure card. 光明磊落，胜券在握。

A clear conscience laughs at false accusations.