What it means is I don't want to take unique time that we could be discussing other things in class by covering things that you could have read already.

这只说明我不想在课上单独花时间,来讲你们可能已经看过的东西,这个时间可以用来讨论其他内容

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选