All right, and let's just check this out, because I want to make a point of this, let's go back and do the following.

好，让我们记住这一点，因为我想要强调下这里，我们回过头去做如下的操作：

麻省理工公开课 - 计算机科学及编程导论课程节选

I'm not sure if they make you pay a deposit, but I think you can just check them out, and then you'll have them for the semester.

我不知道是否需要交押金,不过你们可以去登记领取,使用一个学期的时间

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选