I have the skeletal structure written up there, I've written it twice and you'll see why in a minute.

我已经把它的骨架结构画在上面了，我画了两遍，等会你就会知道为什么。

麻省理工公开课 - 化学原理课程节选

Next time reread for the third time - you will be repaid by your dedication - Books One and Two, this time focusing on the similes. Also, as I mentioned at the beginning of class, read the essays by Stanley Fish and Geoffrey Hartman.

下次再把这两册书读一遍,你们的付出终将得到回报,第一二册书，这次的重点在明喻上，同时，正如我在课的一开始提到的，看斯坦利·费什和杰弗里·哈特曼写的文章。

耶鲁公开课 - 弥尔顿课程节选

He repeats it twice.

他重复了两遍。

耶鲁公开课 - 现代诗歌课程节选

Notice the quotes around it.

注意两遍的引号。

麻省理工公开课 - 计算机科学及编程导论课程节选

And although I don't really have the fantasy that many of you will read this stuff twice, if you had the time to do it, that would be a wonderful thing to do.

并且尽管我不会真的认为,你们中的有些人会读两遍这些材料，如果你有时间去读的话，那将会是很棒的事去做。

耶鲁公开课 - 死亡课程节选

So, the point is whenever you have derivatives with something over dt, do not hesitate to cancel the dts This will be actually true as long as both quantities are vanishingly small.

关键在于,只要你推出的式子分母上有dt,不要犹豫,直接约掉,这个式子只在,两遍都是无穷小的情况下成立

耶鲁公开课 - 基础物理课程节选