And J.J. Balmer in 1885 playing with the numbers asociated with the lines there, you notice how the lines are colored?

885年，巴尔末,开始把光线与数字联系起来，你注意过光线是怎样被赋予颜色的吗？

麻省理工公开课 - 固态化学导论课程节选

Now, did any of you notice how often Sal eats pie?

好，你们注意过Sal是怎么吃派的吗？

耶鲁公开课 - 1945年后的美国小说课程节选

But you notice up here how close these levels are, so we are looking at very, very fine distinctions.

你能看到这些层有多接近，所以我们是在观察非常非常细微的差别。

麻省理工公开课 - 固态化学导论课程节选

And the last piece I want you to see here, and then I'll let you go is, notice now how that encapsulation, that binding things together has really helped me.

我想要的那么干净，最后一点要给大家讲的是，也就是下课前讲的一点，就是请注意这里是怎么封装的,也就是把东西绑定在一起。

麻省理工公开课 - 计算机科学及编程导论课程节选

When you're caught up in the dream, you don't notice just how insane it all is.

当你被卷入梦中时,你不会意识到它有多疯狂

耶鲁公开课 - 死亡课程节选

I want to show you how easy it is to change the code. But, notice, once I've added this I actually have a problem. This is now an under-constrained problem. I have more unknowns than I have equations.

我加上这个条件后,我马上面临一个问题了,这就是现在是一个非约束性问题了,我的未知数比方程数多,你从代数中可以知道。

麻省理工公开课 - 计算机科学及编程导论课程节选

And as you read Lolita, try to notice how much light imagery there is.

你们读Lolita的时候，要注意用的关于光的比喻。

耶鲁公开课 - 1945年后的美国小说课程节选