He was always trying it on. But now he's 71, it's causing problems. He's just a dirty old man.

他以前总想乱来。但现在他已71岁，有些力不从心了。不过是个老色鬼罢了。

柯林斯例句

What a terrible joke, you are a dirty old man.

你这个玩笑太无聊了, 老色鬼.

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I have fear that my friend will someday be a dirty old man too.

我害怕有一天我的朋友也会变成老色鬼.

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