他上课的时候，他通常都是不需要课本的。
学堂主要在每周的周末，周一和周二开设，CS50，sections，are，standardized，on，Sundays，，Mondays，and，Tuesdays,我们不需要你很死板，用大约一周的时间来上课,而是很随意,只需要你每周末，周一和周二来就可以了。
CS50 but we won't officially assign you to sections for a week or so but unofficially, well, there'll be open sections this coming Sunday, Monday, Tuesday.
吴为山：许多大学生不知道金钱的重要性，因为他们不需要自己去挣钱。所以除了上课外，我们也要鼓励大学生去做一些兼职工作。
People often tell students how to save money. But I think we also need to learn how to manage the money we have saved.
上课前：提前2到3小时空腹，若感到饥饿可适当补充水果、饮料等不容易滞留在胃里的以及不需要消化很久的食物。
Before class: 2 to 3 hours ahead of fasting, if the hungry may be appropriate to add fruits, beverages, etc. is not easy to stay in the stomach and digesting a long time without food.
如果你一直在上课学习，那么水平较低的考试当然就不需要太多的特殊准备。
Certainly the tests and exams at lower levels do not require a lot of special preparation if you follow a course of study.
我们努力延长上课时间，对学生一概进行标准化测试，但也许孩子们并不需要另一个革新强加在他们身上。
We have tried making the school day longer and 23 blanketing students with standardized tests. But perhaps children don't need another reform imposed on them.
我们努力延长上课时间，对学生一概进行标准化测试，但也许孩子们并不需要另一个革新强加在他们身上。
We have tried making the school day longer and 23 blanketing students with standardized tests. But perhaps children don't need another reform imposed on them.
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