"Three or four hours before I could fall asleep. I wake up three o'clock in the morning with the same stuff on my mind, tossing and turning.

VOA: standard.2010.05.04

We have students come to five hours' class, in the same room.

学生在同样的教室里，上五小时的课。

麻省理工公开课 - 媒体、教育、市场课程节选

you always have to sit in the same room for three hours for multiple classes.

你必须在同一个房间为了多个课程坐三个小时。

对于古怪教授 - SpeakingMax英语口语达人

And the same thing with the office hours for the TAs.

和助教们的办公时间是一样的。

麻省理工公开课 - 固态化学导论课程节选