Some of you may be thinking, "Sixty class hours is a lot."

有些人可能会想：“60个课时太多了。”

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They are supposed to do sixty class hours of volunteer work before graduation.

他们应该在毕业前做60个课时的志愿者工作。

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Enrolling at age 94, she lacks only 30 class hours to earn a bachelor's degree.

她94岁那年入学，她只差30节课就可以拿到本科学位了。

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So, I make a pledge. You give me seven hours a week, you will pass this class, not just by the skin of your teeth. You will pass it.

我保证，你们要是一周学习7个小时，肯定可以通过这门课，一点都不惊险，你们会通过的。

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So I ended up sleeping maybe 4 or 5 hours and going to class.

结果我只能睡四五个小时，然后就要去上课。

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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。

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Mandarin competence takes 2, 200 class hours, with half of that time spent in a country where it's spoken, according to the U.S. State Department's Foreign Service Institute, whereas Spanish can be learned in 600 to 750 class hours.

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Think about these guys -- you work eight hours, you go to class 12 hours, you're working -- you're sleeping in between, doing that for six months.

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The Centers for Disease Control and Prevention recommends someone sick with the virus remain out of class for 24 hours after fever has abated on its own.

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