It's important for you guys to know that everything you write down in the notebook or blackboard as a symbol is actually a measured quantity.

其重要性就在于,你们要知道,你们记在本子上或者写在黑板上的任何物理符号,实际上都是测量量

耶鲁公开课 - 基础物理课程节选

In addition, in terms of conveying content, we prepared a notebook, where we had all the teaching materials that Professor Low used in this lecture on paper.

另外，从传递信息而言，我们准备了一个笔记本，其中包括Low教授课上,用到的所有教学资料。

麻省理工公开课 - 媒体、教育、市场课程节选