It's just taken out of the reading of lecture notes.

只需要记录下阅读文献的号码就行。

麻省理工公开课 - 固态化学导论课程节选

with, like, things written on it, like, notes you've taken or things you want to remember.

你可以在那张纸上写些东西 ，比如你以前做的笔记，还是你想记下的内容。

考试应该这么准备 - SpeakingMax英语口语达人