As we've seen systematically in the don't-takes, the only thing that gets changed is the index.

当我们系统的看这些,不应该装的物品时，唯一改变的是索引值。

麻省理工公开课 - 计算机科学及编程导论课程节选

These are words you're not supposed to use in poems or in even writing about poems.

这些是你们觉得不应该出现在诗歌中的词,或者是写关于诗歌的东西时。

耶鲁公开课 - 现代诗歌课程节选

And we shouldn't ignore those similarities.

而我们不应该无视这些共同性。

哈佛公开课 - 幸福课课程节选

Odds are if you're an upperclassman, you've had that experience where it's 12 AM, 1 AM, 2 AM, and you're really starting to stress over the incompletion of some problems that for some course, well frankly what this mechanism allows you to do if you're already 90 percent of the way there, you can call it a night and you can put it down and you could feel good nonetheless about where you got to.

对于上游的同学可能觉得无趣，因为他已经具备了这些经验，这时应该开始关注某些课程中,问题的不完整的部分，如果你已经学会了,里面90%的知识，你可以停工,或者把这门课扔到一边。

哈佛公开课 - 计算机科学课程节选