The first lady said the plan also includes increasing the number of high school students who take part in physical education classes.

VOA: special.2010.06.07

I said this sentence in one of the first two classes, 'all cells are the same', and you know that's true.

我曾在头两节课的哪里讲过,所有细胞都是一样的,你们知道的

耶鲁公开课 - 生物医学工程探索课程节选

and the first year is compulsory classes. Everybody takes the same classes.

第一年学习必修课。每个人的课程都一样。

哈佛法学院的课程 - SpeakingMax英语口语达人

He spoke on the first day of classes at a high school in Virginia.

VOA: special.2009.09.10

The first level it will be taught as any other class in psychology or any of the classes you've taken here.

第一部分会和其他心理学,或者其他任何课程一样。

哈佛公开课 - 幸福课课程节选

"We're very proud that of our first three graduating classes, have not only graduated from View Park Prep, but also have enrolled in top colleges and universities in the United States."

VOA: standard.2010.06.24

Whenever I think about how to build an interesting program, and I hope whenever you think about it, the first thing I think about is, what are the classes I might want to have, what are the types?

无论我何时,去想怎样建立一个有趣的程序，你们每次做这种思考的时候，你们想得第一件事，就是我应该要有什么类呢，它们是什么类型的呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

professors with good ratings, their classes get taken up first

评价好的教授的课先选满，

课程评价网站 - SpeakingMax英语口语达人