有那么多萨姆当时还不知道的。

There was so much that Sam didn't know yet.

《柯林斯英汉双解大词典》

你不知道玛莎有多害怕。

You don't know how frightened Martha is.

youdao

你不知道我有多幸运吗？

Don't you know what good luck is mine?

youdao

What I just spent many lectures discussing is the fact that we can not know how far away an electron is from the nucleus, so we can't actually know the radius of a certain atom.

我花了这么多课时所讨论的正是我们,不可能知道电子离原子核有多远这一事实，因此我们不可能知道某个原子的半径。

麻省理工公开课 - 化学原理课程节选

So, if there is one section of the lecture that I went a little too quickly for, you could say, gee, if I could just see that five minutes, you could click on it, zoom into that five minutes, play it a few times, and then say, I still don't know what he's talking about.

所以，如果有那节课,我上得过快，你可以说，天啊，我多希望我能看到那5分钟，你就能点击它，选择那五分钟，播放几次，然后说，我还是不知道他在说什么。

麻省理工公开课 - 固态化学导论课程节选

One of the discomforts, one of the reasons that I think so many people in society and even in this class are uncomfortable when it comes to computers and intimidated by technology and kind of throw up their hands when things go wrong that you don't understand is frankly not necessarily your fault.

当我想到在社会中，即使在这个班级上,有那么多的人,使用计算机时是不舒服的,他们被这种科技吓到了，束手无策,当发生故障时，你也不知道，其实,这也不是你的过错。

哈佛公开课 - 计算机科学课程节选