Even if you're doing the readings from the textbook, you'll get stuff from my lectures that you won't get elsewhere.

就算你完成了课本上的阅读，有些知识只能从课堂上获得。

耶鲁公开课 - 新约课程节选

When you go today and look at the homework, you'll find the problem from the textbook, one extra problem that deals with all of this.

你们今天回去看到作业,就会看到课本上的一道题目,这道附加题涵盖了所有知识点

耶鲁公开课 - 基础物理课程节选