I mentioned the book for the course and the book is a book that I've written.

我提到过这门课程用到的教材,这本书是我写的

耶鲁公开课 - 生物医学工程探索课程节选

whereas for me, it is a completely different, you know, subject material.

但对我来说，这是完全不同的课程教材。

介绍好朋友 - SpeakingMax英语口语达人