I was thinking about this the other day as I was preparing the lecture for today.

那天在我准备今天这节课时,我在想

耶鲁公开课 - 聆听音乐课程节选

He woke up thinking about what he was going to lecture on in class today, just like I woke up thinking about what I was going to lecture in class today.

他醒来，想着今天的讲授要说什么，就像我醒来想着今天要讲什么一样。

耶鲁公开课 - 死亡课程节选