We've done this with two sections of 180 students, about ninety in each section.

我们有两个班的180名学生，每个班90个人。

麻省理工公开课 - 媒体、教育、市场课程节选

At each cross-section, people are either willing to use a certain sign in a certain way or they're not.

在每一个横街面上，人们可以自由的,以自己的方式使用符号。

耶鲁公开课 - 文学理论导论课程节选

And you do your work product and you bring it to sections and hand it in to your TA in section each time.

请完成并带好你们的作业,并在每次上课时交给你们的助教

耶鲁公开课 - 聆听音乐课程节选

They just elongated each measure by its same amount so we had harmony changing on each measure, and then in that middle section each chord was changing at the rate of two measures.

但它的基本形式没有改变，而在每个小节中和声都发生了改变，接着在中间的乐节，每个和弦每两小节改变一次。

耶鲁公开课 - 聆听音乐课程节选