But here is something that scientists now know: A team led by Professor Fu has reported the first genetic link to how much sleep we need.

VOA: special.2009.08.26

So, we have beryllium in the first case here, it has four electrons, that's how we know it's beryllium, boron has five electrons.

那么我们将铍作为第一个例子，它有四个电子，这也是我们为什么能知道它是铍的原因，硼有五个电子。

麻省理工公开课 - 化学原理课程节选

Well, he also did architecture like me, so that's how we know each other.

嗯，他也像我一样搞建筑，我们就是那样认识彼此的。

我喜欢的建筑物 - SpeakingMax英语口语达人

Now,we admit that we do not know how this expression developed.

VOA: special.2009.06.28

Also, it is cylindrically symmetric around the bonding axis, so this is how we know that it's a sigma orbital.

此外，它关于键轴是圆柱对称的，这就是为什么我们知道它是sigma轨道。

麻省理工公开课 - 化学原理课程节选

"We need an army of people who are equipped to know how to work at all levels and all scales, from protecting animals in the wild to providing shelter to them in zoological parks if necessary."

VOA: special.2010.06.22

We know that we've already learned from Heidegger and the hermeneutic tradition that we know them as something, but it remained to show how we know them.

海德格尔已经告诉我们,从解释学的角度出发我们认知了什么，但是我们是怎么认知的呢？

耶鲁公开课 - 文学理论导论课程节选

So instead of watching bullying take place or joining in with the bullying, these programs teach bystanders how to stand up and be supportive of the kids who are being victimized and to say 'You know we don't do that here, we don't engage in those behaviors.'" Professor Swearer advises parents and teachers to try to get children to talk to them about being bullied.

VOA: special.2010.05.06

So, we need to take a look at the question of what they are, and how we know about them, and so on.

那么,我们得了解什么是诗歌,如何学习研究诗歌,等等

耶鲁公开课 - 古希腊历史简介课程节选

We are worried because we do not know how long they will stay or how we will take care of them.

VOA: standard.2009.10.27

Let's talk about how we know about the link of diet and health.

那我们是如何得知饮食与健康的关系的呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

There's another path by which they can learn about accelerators and particle detectors essentially, how do we know any of this.

VOA: standard.2010.03.05

That's how we know this is me speaking.

因为这是我本人的回答。

耶鲁公开课 - 死亡课程节选

We don't know how much the Israelis have produced etc.etc. So we don't have an accurate gauge."

VOA: standard.2010.04.06

That's how we know the downbeat.

这也是我们知道重拍在哪里的途径

耶鲁公开课 - 聆听音乐课程节选

When I used to know you so well Yeah, yeah, yeah How did we get here?

VOA: standard.other

We need to know not only what are the primitives, but how do we make things meaningful in that language.

我们不仅需要知道什么是基本类型，还要知道我们在那种语言中,怎样使其变得有意义。

麻省理工公开课 - 计算机科学及编程导论课程节选

We've worked on 10 or 12 floats, so we know basically how to go about this,".

VOA: standard.2009.12.30

So I mean philosophy can talk about how do we know we got a table here between us. Right?

比如，哲学可以告诉我们是怎么感知到,我们之间有一个桌子，对不对？

普林斯顿公开课 - 人性课程节选

We did not know how quickly it was going to move. flu, you cannot catch up.

VOA: standard.2009.05.03

OK, so now the question is, how do we know the first place that this is a suitable reductant?

好的，现在的问题是，我们如何能知道第一步中,镁是一个合适的还原剂？

麻省理工公开课 - 固态化学导论课程节选

Well, I think I know how Do you see what we've done We're gonna make such fools of ourselves How did we get here?

VOA: standard.other

Also, we need to know how much individual stocks are correlated with rm; we measure that by the regression coefficient.

我们必须清楚,有多少个股与市场总体收益率相关;,我们用回归系数，即β系数来表示。

耶鲁公开课 - 金融市场课程节选

About 4,000 - year-old corals? We don't know how much oil is down there."

VOA: standard.2010.06.08

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

"Before we not that smart. Now we know what going on, how much they cheat us, how much they want us to be slave for them."

VOA: standard.2010.05.14

And we know how easy it is to miss part of reality, even they are right in front of our very eyes.

我们知道无视一部分现实是多么容易，就算他们就在我们眼前。

哈佛公开课 - 幸福课课程节选

When I used to know you so well YeahBut how did we get here?

VOA: standard.other

This is going to be probably a homework at some point to do this. For now, let's take it for granted. Let's take it for granted that we know how to calculate this derivative from an equation of state like this.

这可能是将来的一个课后作业,现在，请把这当成理所当然的，理所当然地认为我们,知道怎样从一个状态,方程计算这样的微分式。

麻省理工公开课 - 热力学与动力学课程节选

We want to know how much force it exerts when I pull it by a certain amount.

我们想知道当我们将弹簧拉伸一定量时,它能产生多大的力

耶鲁公开课 - 基础物理课程节选