I took your bag instead of mine by mistake.

我不巧错拿了你的包。

《牛津词典》

He opened Ingrid's letter by mistake.

他误拆了英格丽德的信。

《柯林斯英汉双解大词典》

He drilled through the wall by mistake.

他误将墙壁钻穿了。

《牛津词典》

When a friend is troubled by a mistake he has made, you might tell him to forget about it.

VOA: special.2009.05.10

Maybe I made a big mistake by likening it to an organic chemistry course-- I don't mean to turn you off.

也许将其比作有机化学课,是个错误,我不是故意想倒你们胃口的

耶鲁公开课 - 金融市场课程节选

You can explain to the waiter that he has made a mistake by using the "I didn't" pattern.

你想跟服务员解释，他弄错了。你就可以使用“I didn't”句型。

I didn't 课堂 - SpeakingMax英语口语达人

One Aceh resident, Murtala, told the BBC Indonesian service his father had been arrested by mistake.

BBC: Amnesty: Indonesia 'failing to uphold' Aceh peace terms

No-one honked their horn, and no-one went out of turn - except, perhaps, by mistake.

BBC: The selfless America outsiders don't see

Five U.S. servicemen were injured when an American jet bombed a U.S. location by mistake.

CNN: Taliban prisoner revolt crushed, cleanup begins