You'll cross the bridge when you come to it.

　　船到桥头自然直。

　　cross the bridge when once comes to it 字面意思是：“当你来到桥边的时候你就可以跨过桥了”，这句谚语对应汉语中的谚语：“船到桥头自然直”，劝慰人们不杞人忧天，事情终会有转机的。因此，当美国人说"You'll cross the bridge when you come to it."时，他/她要表达的意思就是:"You can deal with the problem when it appears."、"The problem will get solved at last."。

　　情景对白：

　　Jane: The meeting will begin in half an hour. But my partner hasn't come yet. He's got all our files.

　　简：半小时后就要开会了，可是我的搭档还没来，我们的资料可都在他手上呀。

　　Shirley: Don't worry. You'll cross the bridge when you come to it.

　　雪莉：别担心了，船到桥头自然直。

　　搭配句积累：

　　①It seems that I can't complete the project on time.

　　看来我不能按时完成计划了。

　　②I haven't done this kind of work before. I can't handle it.

　　我从没做过类似的工作，我做不来。

　　③What if we can't make the contract signed?

　　要是我们合同签不成怎么办？

　　④It is said that the client is very fussy. I'm afraid I can't make it.

　　据说这位客户非常挑剔，我怕应付不过来。

　　单词：

　　fussy adj. 爱挑剔的

　　She is not fussy about her food.

　　她不挑食。

　　Her aunt was small, with a rather fussy manner.

　　她的姨妈个子矮小，为人相当挑剔。

　　And certainly an artistic temperament is a fussy temperament.

　　当然,艺术气质是一种过分挑剔的气质。