So it is quite a cross cut of students in the class.

班里的学生可谓五花八门。

哈佛公开课 - 幸福课课程节选

He does go around and around the same idea a number of times, which does cut down on the notes for the class, " but it can get a little boring."

他的确一遍遍重复同样的观点很多次，从而减少了课程的笔记内容，但是会让人感到有点无聊“

耶鲁公开课 - 死亡课程节选