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1·To run or cause to run off the rails.

属于轨道的或与轨道有关的。

2·I'm afraid the engine will run off the rails.

我怕火车头要出轨了。

3·Who would have thought that Mary, of all people, would run off the rails?

就所有的人来说，谁会想到玛丽竟会有越轨的事？

4·Who would have thought that Mary, of all people, would run off the rails? She seemed to be the perfect faithful wife.

所有的人来说，谁会想到玛丽竟会有越轨的事？她看起来像个极其忠诚的妻子。

5·There are so many ways a first conversation can run off the rails - a misinterpreted word, an inappropriate joke, a whopper of a prejudice.

两个人初次见面就脱轨的情况有多种方式：比如误解了对方的话；开了一个不恰当的玩笑；对某事有很大的成见等等。