The meaning of buff that we do know about is one that describes a person.

VOA: special.2009.05.17

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

As much as I don't look forward to it, I do know that I'm going to have to."

VOA: standard.2010.03.18

Yeah, good. So, they're actually helium atoms, helium ions. And this wasn't really important for the studies, it didn't matter that didn't know what they are but it's nice to kind of know now - that we do know what they were using.

氦粒子，这对他们的研究并不重要,他们并不需要知道它是什么,但我们最好知道,他们当时用的是什么。

麻省理工公开课 - 化学原理课程节选

"What we do know is that the airline left last night for Tripoli.

VOA: standard.2010.05.12

We do know it exerts a force, so here's what you do.

我们只知道它施加了一个力,所以你应该这么做

耶鲁公开课 - 基础物理课程节选

"We do know that your friend, Senator George Mitchell, who,of course, played such a valuable role in Northern Ireland, has applied himself diligently and with great attention to detail."

VOA: standard.2010.03.16

I'm sure you all do know people who believe in it.

我肯定你们都认识一些相信这个观点的人

耶鲁公开课 - 死亡课程节选

"We think that they may be. We do know that people who are taken out of high tobacco smoke environments have a definite drop in developing coronary artery disease.

VOA: standard.2010.03.04

So the exceptions are useful when you want to have the ability to say, I expect in general this kind of behavior, but I do know there are some other things that might happen and here's what I'd like to do in each one of those cases. But I do want to make sure that I don't let a value that I'm not expecting pass through.

所以当你希望有能力说,我希望一般是这样的行为,异常是很有用的,但是我明白还有一些其它的情况可能发生,我希望对每一种情况都这么做,但是我跟希望能保证,没有让一个预期之外的情况漏过去。

麻省理工公开课 - 计算机科学及编程导论课程节选

"We do know that al-Qaida has nuclear ambitions,"

VOA: standard.2009.05.01

I do know someone who is fully supported by the government because he was in the army,

我知道这样一个人。他的学费完全由政府来缴纳，因为之前他在美国军队服役，

拿全额奖学金 - SpeakingMax英语口语达人

He says finding that out will be crucial. "Whether this was an act of terrorism conducted by al-Qaida central or that of a lone wolf acting independently, we will have to wait and see for the investigation and what comes out of that, but we do know that al-Qaida and their affiliates have a crazed obsession in targeting the aviation industry,"

VOA: standard.2009.12.27

That's not as much in my area of specialization, but I do know that

这不太属于我的专业领域，但是我知道

对于未来的技术 - SpeakingMax英语口语达人

I do not know what else to do but make the best of a bad deal and shake hands over it."

VOA: special.2009.06.27

OK, so do we know anything so far that we can point to that would give us a departure?

好，到目前为止我们能在我们了解到的,东西中找出一些违背这些规律的例子吗？

麻省理工公开课 - 固态化学导论课程节选

"Aylmer," said Georgiana, "I do not know what the cost would be to both of us to remove this birthmark.

VOA: special.2009.09.26

How do we know that everyone choosing 1 is the Nash Equilibrium in the game where you all chose numbers?

我们怎么知道在那个数字游戏中,选择1就是这个博弈的均衡呢

耶鲁公开课 - 博弈论课程节选

Let us say I want to sell my car but I do not know exactly how much it is worth.

VOA: special.2009.04.12

The second question is: from the pedagogical perspective, not from the business perspective, but from the pedagogical perspective, do we know what the learning system is all about?

第二个问题是：,从教学法的角度看，不是商业视角，而是教学法的角度，我们明白什么是,学习体系吗？

麻省理工公开课 - 媒体、教育、市场课程节选

"Vice President Lyndon Johnson has left the hospital in Dallas, but we do not know to where he has proceeded.

VOA: special.2009.08.16

I mentioned previously that we do not know a lot about how the mechanical stimulation is being converted into chemical and electrical energy.

先前我曾说过,对于机械刺激到化学和电能的转换,我们还知之甚少。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

why,when we do not sleep, we do not function well. We just do not know much about sleep at all."

VOA: special.2009.08.26

At least Russia and China do you know anything about their history?

至少应该有俄罗斯和中国,你们了解这两国的历史吗

耶鲁公开课 - 金融市场课程节选

Many people who come to Las Vegas in hopes of winning lots of money do not know when to stop gambling.

VOA: special.2010.03.14

How do we know it when we see it?

我们如何知道它是文学？

耶鲁公开课 - 文学理论导论课程节选

What I do is I always know who I am writing for, I always know the ensemble or the soloist.

VOA: special.2010.07.12

What do we know from research is that smiles are contagious.

研究证明笑有传染性。

哈佛公开课 - 幸福课课程节选

Do you know any policies that the U.S. government is using to fight global warming?

你知道一些美国政府应对全球变暖的政策吗？

对全球变暖的政策 - SpeakingMax英语口语达人