So Mara's going to be the person who will see you after class and she will take the problem sets that you have submitted before class and she'll give you the graded ones after class.

玛拉将是你们的课后辅导老师,她会批改你们上课前交给她的作业,课后她会将批改后的作业发还给你们

耶鲁公开课 - 基础物理课程节选

I used to... you know, I lived and worked out of Sloane Lab up on the hill and it was easy to have office hours before or after class but now you have to make a special trip.

我以前...,我以前的工作和住的地方都是斯隆实验室外的,小山上,那时的开放时间设在课前或课后对我来说都很方便,但是现在你们就得费点儿周折了

耶鲁公开课 - 基础物理课程节选