- So what's for all this function -- what's the role of this function in life?

这个函数是干什么的-,这个函数的最终角色是什么呢？

哈佛公开课 - 计算机科学课程节选

So realize you don't have to get it right the first time, but you have to listen and watch to what actually those problems are and that is one of the roles your teaching fellows play.

请认识到，并不是要你第一次就把事情搞对，但是你必须听听，看看,问题是到底什么，这也是你们的助教,扮演的一个角色。

哈佛公开课 - 计算机科学课程节选