If you don't understand something that happened in class, you want to reinforce an idea that came up in class, then you should read the relevant chapters in the book and the syllabus will tell you which chapters to read for each class, or for each week of class, all right.

要是你课堂上没听懂,或者你课下想深入了解下课上的内容,你应该去读书上对应的章节,教学大纲会告诉你每堂课讲哪章,或者每周讲哪几章

耶鲁公开课 - 博弈论课程节选