How do you know, not only that it didn't happen to you last night?

你怎么知道，只是昨晚没有发生？

耶鲁公开课 - 死亡课程节选

So when your friend ask you to go out that night even though it's something that you usually like to do,

所以当朋友们想叫你晚上一起出门玩的时候，尽管这是你平常挺爱干的事，

I feel like 课堂 - SpeakingMax英语口语达人

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