I don't know how this happened.

我不知道这事怎么发生的。

《牛津词典》

I don't know how you stick that job.

我不知道那活儿你怎么受得了。

《牛津词典》

I don't know how she puts up with him.

我不明白她怎么受得了他。

《牛津词典》

"These are only their first Olympics." "And being at home, I don't know how they stood the pressure, because I certainly couldn't.

VOA: standard.2010.02.23

- You open Brooks and you find yourself really apart perhaps-- I don't know how well all of you are acquainted with the texts of Freud.

也许你们看布鲁克斯的作品时会觉得很头疼-,我不知道你们对弗洛伊德那几篇文章理解的如何了。

耶鲁公开课 - 文学理论导论课程节选

Yeah, it was a good film. I mean, I don't know how much of it was accurate or not.

它是一部好电影。我的意思是，我不知道有多少内容是准确的。

英国电影的魅力 - SpeakingMax英语口语达人

"I don't know how to describe it, " said Dubinsky, who also had 20 goals in 2009-10.

WSJ: Team Success Hides Brandon Dubinsky's Woes

"I don't know how we're going to close that gap, " he told his wife.

FORBES: Other People's Money

If you raise my property taxes, I don't know how I'm going to survive.

WSJ: The Weekend Interview with Gina Raimondo: The Democrat Who Took on the Unions