United we stand, divided we fall.
Variety is the spice of life.
Virtue¹ is its own reward.
Walls have ears.隔墙有耳。
Waste not, want not.
Watch sb. As a cat watches a mouse. 象猫盯耗子般地盯着某人。
What are the odds² so long as you are happy.
What may be done at any time will be done at no time.在任何时候都可做的事情，总是在任何时候都不做的事情。
What you don't know can't hurt you.
What you lose on the swings you get back on the roundabouts.
Whatever is worth doing at all is worth doing well.凡是值得做的事，就值得做好。
When an opportunity is neglected,it never comes back to you.机不可失，时不再来；机会一过，永不再来。
When in doubt, do nothing.
When in Rome, do as the Romans do.
When the cat's away, the mice will play. 猫儿不在,老鼠成精(大王外出, 小鬼跳粱)。
Where there is no trust there is no love.
Where there is a will, there is a way. 有志者事竟成。
Where there is life, there is hope. 留得青山在，不怕没柴烧。
Wisdom in the mind is better than money in the hand.胸中有知识，胜于手中有钱。
Wisdom is a good purchase though we pay dear for it.为了求知识，代价虽高也值得。
Wisdom is better than gold or silver.知识胜过金银，
Wisdom is more to be envied than riches.知识可羡，胜于财富。
Wisdom is to the mind what health is to the body.知识之于精神，一如健康之于肉体。
Wit once bought is worth twice taught.由经验而得的智慧，胜于学习而得的智慧；一次亲身的体会，胜过两次的教师教导。
Without a shepherd, sheep are not a flock³.
Work bears witness who does well.工作能证明谁做的好。
Work makes the workman.勤工出巧匠。
Work today,for you know not how much you may be hindered⁴ tomrrow.今朝有事今朝做，明朝可能阻碍多。
World is but a little place, after all.
You cannot have it both ways.
You cannot have your cake and eat it.
You can't make an omelette without breaking eggs.
You can't please everyone.
You can't take it with you when you die.
You can't tell a book by its cover.
You can't win them all.
You don't get something for nothing.
You win some, you lose some.