You really don't know what's going down?

你真的不知道发生了什么事？

《牛津词典》

Military historians may never know what brought down the jet.

军事史学家们也许永远不会知道是什么击落了那架喷气式飞机。

《柯林斯英汉双解大词典》

Do you know the correct way to shut the machine down?

你知道这台机器该怎么关吗？

《牛津词典》

And its warming,you know." Down the street, Mary Ellen also pairs love with warmth, especially in its liquid form.

VOA: standard.2010.02.13

Let's write everything that we know down.

我们的所有已知条件。

麻省理工公开课 - 热力学与动力学课程节选

You know, frankly, when it comes down to it, people want to give money and get something in return.

坦率地说，归根结底一句话，人们在有所投入的时候也是期待有所回报的。

不平等的赞助入学 - SpeakingMax英语口语达人

Little did I know down the line we would have to make the choice but I am glad that we did.

BBC: Organ donor series

Know down to the penny what you need to earn, and learn how to save more, manage better and grow your money.

FORBES: The Myth Of Career Bliss

Would you know down deep that at the end of the day has caused you to lose your chance at retribution, a chance to be compensated for damages, to restore your family life?

CNN: Transcript: House manager Gekas' statement on the law