Even if one person is hurt that is one too many.

伤员一个都不要出现。

I can't drive, I had one too many.

我不能开车，我喝太多了。

The last stone was one stone too many.

最后一块石头太大了。

I found myself one too many among people.

我发现自己在人群中是个多余的人。

He bought four tickets, which was one too many.

他买了四张票，多了一张。