I can't go down to the registrar and say, you know, I'd really like to do it at another time.

我不能去和登记的人说，我想要换个时间。

麻省理工公开课 - 固态化学导论课程节选

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

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