这句话直译过来就是“这里要么不下雨，一下雨就是瓢泼大雨。”作为一句英文俗语，这句话其实表达的是“祸不单行”的意思。我们举个例子来看看具体怎么用。

I really feel sorry for Mike. First his wife left him. Next he lost his job. Then somebody stole his car. Like they say, it never rains but it pours. 我真是为迈克感到难受。先是他的太太离开了他，然后他又丢了工作，接着，他的车又被人偷了。这真是像人们所说的，祸不单行呀。

不过，看来倒霉的人似乎还不止他一个。下面说话的人也是够倒霉的：

Oh boy! You can't believe the trouble I had today. My alarm clock didn't go off, so I missed biology class. Then, I lost my home work assignment for math. I invited my girlfriend to lunch and after we ate, I found I'd left my wallet at home. It never rains but it pours. 咳，你真不会相信今天我有多倒霉。首先，我的闹钟没有响，所以我没有上生物课。然后，我又把我的数学作业给丢了。我请女朋友吃午饭，吃完饭我才发现我把钱包忘在家里了。这可真是祸不单行啊。