"What we know from research on teen brain development, is that teens don't really have fully developed brains until they're twenty-five years old.

VOA: special.2010.07.01

So, we know from our calculation that we can do over here, that this bond is polar.

我们通过计算都知道,这个键是非极性的。

麻省理工公开课 - 固态化学导论课程节选

it just so happened that two other people I know from back home transferred the same time I did.

刚好我在家认识的两个人也和我同时转过来了。

留学生的适应期 - SpeakingMax英语口语达人

"We know from our very own eyes that it's happening. We're not kind of hearing it third hand.

VOA: standard.2010.05.24

And the way it manifests itself, as you know from just how people talk, is you're compulsive, you're clean, you're stingy.

这种人格表现为，强迫，有洁癖和吝啬，这些都可从人们谈话方式看出。

耶鲁公开课 - 心理学导论课程节选

"What we know from research on teen brain development, is that teens don't really have fully developed brains until they're 25 years old."

VOA: standard.2010.06.24

But the reality that we know from our quantum mechanical model, is that we can't know exactly what the radius is, all we can say is what the probability is of the radius being at certain different points.

我们不可能准确的知道,半径是多少，我们只能说，它在不同半径处，的概率是多少，这是,量子力学。

麻省理工公开课 - 化学原理课程节选

She says she researches her family history because she wants to know where she came from, who her ancestors were.

VOA: special.2010.06.28

You know from experience if you've ever mixed them to make salad dressing, they don't mix too well. And you may know that if you heat them up, they mix much better.

经验告诉我们,你无法把它们混合做成色拉酱调料，他们不会很好的混合，但是你也知道,如果我们把他们加热，就能够混合的更好。

麻省理工公开课 - 热力学与动力学课程节选

Vo Ngoc Toan from Vietnam would like to know about the TOEIC - the Test of English for International Communication.

VOA: special.2009.01.15

So you know from algebra I can't actually solve this. There may be multiple solutions to this. What would I have to do to change my code? And the answer is fortunately not a lot.

我解不出来方程,可能会有多组答案,我需要怎样修改我的代码呢？,很幸运的,答案是不用修改很多。

麻省理工公开课 - 计算机科学及编程导论课程节选

In fact,much of what historians know about the president's time at the house is from stories told by those soldiers.

VOA: special.2010.05.10

Well, the energy of the photon, hv we know from Planck, is h nu, which is hc over lambda.

好吧，光子，我们从普朗克那得知，它是，即hc/lambda，波长。

麻省理工公开课 - 固态化学导论课程节选

John Glenn, the former astronaut who was then a senator from Ohio, put it this way: "I know the Great Lakes.

VOA: special.2009.01.05

Now the first the eat food: well he has a long discussion, and as you'll know from the book, about what is food?

他做了大篇幅关于饮食的讨论,你可以从书中了解到,什么是食物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Americans know about them mainly from a history of use as pack animals in Arizona and other areas of the desert Southwest.

VOA: special.2010.02.16

You know from our discussion last time that these two complimentary strands are not mirror images of one another, they're not identical, they're complimentary.

从我们上次的讨论中可以得知,这两段互补序列并非互为镜像,它们并非相同,而是互补的

耶鲁公开课 - 生物医学工程探索课程节选

A listener in China, Jack Hoo from Jiangsu province, wants to know how American college graduates find jobs.

VOA: special.2009.06.25

He was long in choosing the subject of his heroic song and, as we know from all of -- and we've encountered a number of them - all of those protestations of delay Milton began his epic late.

他久久未能确定他要写的英雄之歌的主题，这我们从从弥尔顿多次声言,自己的史诗动笔很晚就能看出。

耶鲁公开课 - 弥尔顿课程节选

A question from Taiwan: Chung Li wants to know why his face turns red when he drinks alcohol.

VOA: special.2009.05.13

All right. And of course, there's trigonometric identities you know from high school.

好的,当然了,你们高中就学过了三角恒等式

耶鲁公开课 - 基础物理课程节选

Kathy in Canada wrote: My daughter likes complaining about everything in the morning, and I know that this is from lack of sleep.

VOA: special.2010.10.14

Some people said of him in real life he had a little button nose. I don't know from some pictures of the look, if they were without make-up.

有人说在现实生活中，他的鼻子,有一点塌，我不知道是否有,没画过妆的照片上有他原本的样子。

麻省理工公开课 - 电影哲学课程节选

We have a question from China. Feng Tianqiang says "I want to know something about John Dewey."

VOA: special.2010.01.07

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

A question from the West Bank: Zuheir Khlaif wants to know how American schools use educational technology.

VOA: special.2009.12.17

We know, from the very first lesson of the class last time, that no one should choose these strategies.

从上堂课中,我们学到了,不要采用这类策略

耶鲁公开课 - 博弈论课程节选

So I know.I saw the whole thing from the beginning, from the very day when the little boy here met with the accident."

VOA: special.2010.05.15

But we know already from week zero that computers ultimately represent all information with numbers, and if they want to represent letters inside memory, well what do they do or what do they use?

但是自从上周我们已经知道,计算机最终是用数字来表示所有的,信息，如果它们要描绘,在内存中的字母，它们该怎么做，用什么方式呢？

哈佛公开课 - 计算机科学课程节选

They maybe even have taken a lot of Sunday School, and so they feel like they know these texts from at least a Sunday School or a church kind of point of view.

甚至还会参加主日学校，所以他们觉得自己很了解这些文本,至少从主日学校或教会的观点来看。

耶鲁公开课 - 新约课程节选