If you don't give me seven hours a week, I don't know what I can do for you.

如果你们一周不学习7个小时，我不知道我能为你们做什么了。

麻省理工公开课 - 固态化学导论课程节选

So why don't you talk about the experience that you had in Israel and also a little bit about what it means to be an Orthodox Jew for those people who don't know maybe the difference between reform and conservative Orthodox.

那何不讲讲你,在以色列的经历,再讲讲,什么是犹太教正统派,向那些可能不知道,改革以及保守正统派的区别的人解释一下。

普林斯顿公开课 - 人性课程节选

We don't know for certain. But what might have happened to lead to the two different editions?

我们不能确切知道，但可能发生过什么,导致了这两个不同版本？

麻省理工公开课 - 媒体、教育、市场课程节选

For those who don't know what this cake means-- fix this in post production.

对于那些不知道蛋糕含义的人-,咦，在后期制作中把这段修复了。

哈佛公开课 - 计算机科学课程节选

I think it becomes 30 degrees for the freezing of water and 22.5 x 4, which I don't know what it is, 90 100 or something -- no, it's 90 I think.

我想水的冰点,应该变成了30度,22。5，4，我不知道是多少，大概100左右--不，我想是。

麻省理工公开课 - 热力学与动力学课程节选

For those of you don't know what that is it's simply an instrument that counts radioactive particles in the air, and MIT now that you're at MIT, you'll all have a chance to see one first hand if you're ever in any of the labs, especially in the chemistry or bio labs.

不知道它是什么,它就是一个简单的,计算在空气中放射粒子数目的仪器,你们现在来了，如果你们在实验室里工作的话,尤其是化学和生物实验室，你们有很多机会亲手用到它。

麻省理工公开课 - 化学原理课程节选

We don't need to know what the particular notes are, but let's look at this just for a moment because it works well as a prototype of melody.

我们不必确切地知道这些音符是什么,但是还是让我们来看一下,因为它简直就是旋律的典范

耶鲁公开课 - 聆听音乐课程节选

I don't know, what would a synonym today be for honor?

我也不知道,现在荣誉的同义词是什么

耶鲁公开课 - 美国内战与重建课程节选

FSMs I don't know what the FSMs are, but the YAFs are the Young Americans for Freedom.

我不清楚什么是，不过我知道YAFs代表的是自由美国青年。

耶鲁公开课 - 1945年后的美国小说课程节选

You need to know how to think about them in the same way we think about s and p orbitals, but for example, you don't yet need to know what all of the names are except for this 3 d z squared here.

你们只要知道，如何像考虑s和p轨道一样,来考虑它们，但你们不需要,知道它们的名字,除了这个3dz2轨道外。

麻省理工公开课 - 化学原理课程节选