You can have too much of a good thing.

你可以拥有太多的好东西。

You can judge a man by the company he keeps.

你可以从一个人的朋友来判断他。

You can't take a cow from a man who has no cows.

你不能从一个没有母牛的人手里夺走一头母牛。

You cannot drink and whistle at the same time.

你不能一边喝酒一边吹口哨。

You cannot have peace longer than your neighbour chooses.

你不能比你的邻居选择更长久的和平。

You cannot have your cake and eat it.

鱼与熊掌不可兼得。

You cannot make a good hunting-horn of a pig's tail.

你不可能把猪尾巴做成很好的猎角。

You cannot pull hard with a broken rope.

你不能用断了的绳子使劲拉。

You cannot sail as you would, but as the wind blows.

你不能随心所欲地航行，只能随风而行。

You cannot shift an old tree without it dying.

老树移不了，就会枯死。

You have either to suffer a lot or die young.

你要么受苦受难，要么英年早逝。

You may often feel that heavily on your back which you took lightly on your conscience.

你可能常常感到沉重的负担压在你的背上，而你却不把它放在心上。

You may preach ever so long to the wolf, he will nevertheless call for the lamb before night.

你可以对狼传很长时间的道，但它仍会在天黑前叫来羔羊。

You may shut your doors against a thief, but not against a liar.

你们可以关上门，防备盗贼，却不能防备说谎话的。

You may speak with your gold and make other tongues silent.

你可以用你的金子说话，也可以使别人缄默。