Who knows most says least.懂的最多的人，说的最少。
Time and tide wait for no man. 岁月不待人。
Don't put off till tomorrow what should be done today.今日事今日毕。
Diligence is the mother of success.失败是成功之母。
It's never too late to learn. 活到老，学到老。
Walls have ears. 隔墙有耳
Wash your dirty linen at home. 家丑不可外扬
Waste not, want not. 俭则不匮
Weak things united become strong. 一根筷子易折断，十根筷子硬如铁
Wealth is best known by want.人穷方知钱可贵