You can hardly keep from getting soiled if you fight with a skunk.

如果你和臭鼬打架，你很难不弄脏自己。

You can lead a horse to water, but you can't make it drink.

牵马到河边易，逼马饮水难。

You can never tell what's in a package by its cover.

你永远也看不出包裹里装的是什么。

You can run into debt. But you have to crawl out.

你可能会负债。但是你必须爬出去。

You can see through one ear and out the other.

你可以从一只耳朵看到另一只耳朵。

You can shut the door on a thief, but you can do nothing about a liar.

你可以把小偷关在门外，但对说谎者却无能为力。

You can't be a howling success by simply howling.

你不可能仅仅通过嚎叫就获得成功。

You can't blame a dentist for looking down at the mouth.

你不能因为牙医低头看嘴而责怪他。

You can't catch fish on a dry line.

干钓是钓不到鱼的。

You can't fly with one wing.

你不能只用一只翅膀飞。

You can't hold another fellow down in the ditch unless you stay down there with him.

你不能把另一个人压在沟里，除非你和他呆在一起。

You can't jest an enemy into a friend, but you can jest a friend into an enemy.

你不能把敌人开玩笑变成朋友，但你可以把朋友开玩笑变成敌人。

You can't keep the birds from flying over your head, but you can keep them from building a nest in your hair.

你不能阻止鸟儿飞过你的头顶，但你可以阻止它们在你的头发上筑巢。

You can't kid your conscience.

你不能欺骗自己的良心。

You can't lose what you haven't got.

你不能失去你所没有的。