I don't expect you to learn that, or even retain it unless I explain the concepts in class, or unless they're explained quite well in the paper itself.

我不要求你们掌握这个,更别提记忆了,除非我在课上做了讲解,或者它们在文章中解释的非常透彻了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The better prepared students have to formulate the concepts, so that they can explain them, which really helps.

准备更好的学生得,建立知识概念，那样才能解释他们，这对他们非常有帮助。

麻省理工公开课 - 媒体、教育、市场课程节选