by mistake

He took his neighbour's raincoats by mistake, so he hung them back outside.

他收了邻居家的雨衣, 于是又它们挂回原处。

She let the news slip by mistake, in an unguarded moment.

一不留神泄漏了消息。

Be careful that you don't set the fireworks off by mistake.

当心点, 别弄了引起那些爆竹爆。

She sprayed hair spray in her eye by mistake.

当成眼药上到眼睛里了。

He made this mistake by accident.

他犯这个误纯属偶然。

I locked him in by mistake.

我误他锁在屋里了。