mistake

I made a spelling mistake in the title of my essay.

(Chinese) 我在文章标题里犯了一个拼写错误。

It was a mistake to leave the windows open during the rainstorm.

(Chinese) 暴雨期间开着窗户是个错误。

I mistook him for my old friend because they look so similar.

(Chinese) 我把他错认成了我的老朋友，因为他们长得太像了。

Don't mistake my silence for agreement; I'm just thinking.

(Chinese) 不要把我的沉默误认为赞同；我只是在思考。