I don't know. Correction—I do know, but I'm not going to tell you.

我不知道。不，我知道不假，但不打算告诉你。

《牛津词典》

I hope you can recognize by my saying that how much you do know about the subject.

我希望你能从我的话中认识到你究竟对这个主题了解多少。

youdao

One thing we do know is that in the decades since Gonur-depe was discovered, the site has deteriorated significantly.

我们确实知道的是，在戈纳尔-德佩被发现后的几十年里，这个地方已经严重恶化。

youdao

But we do know that the violence between the Earps and the Cowboys did not end at the OK Corral.

VOA: special.2010.02.15

Maybe you don't even know what this-- do you all know what carbon paper-- I guess you do know what this is, right?

或许你们甚至都不知道这是什么东西-,你们都知道复写纸吗-,我猜你们都知道这是什么，对吧？

耶鲁公开课 - 金融市场课程节选

And I do know, as I have worked as a publicist, that people do, celebrities do call paparazzi

而且我也知道，因为我曾做过宣传的，有的人，名人，确实会给狗仔队打电话，

溺爱是一种伤害 - SpeakingMax英语口语达人

But certainly we do know that debt is a major issue in this country.

NPR: Women Of Color Lag Behind In Wealth

We do know for sure by now that was the right way to create jobs.

FORBES: How to Create Jobs: Stop Misguiding the Animal Spirits of Entrepreneurs!

But we do know that such changes in style leadership have invariably occurred in the past.

FORBES: About John "Jack" Bogle