If you can't remember your number, write it in code in an appointment book.

如果你记不住你的号码，就用密码把它写在预约本里。

《柯林斯英汉双解大词典》

Write them down in your exercise book.

把它们写在你的作业本里。

youdao

Write down what Bob did yesterday in your exercise book.

在练习本上写下鲍勃昨天所做的事情。

youdao

Court TV Host: Here's something you write about at length in your book...

CNN: Terror on Trial: Author talks about McVeigh book

In short I could write a book about the inaccuracies of your report.

NPR: Do Soldiers Receive Adequate Mental Health Care?

Stop playing a passive role in your change process, looking around for some smart person to write a book, invent a gadget, or offer a seminar that will fix you.

FORBES: And Now for the Toughest Influence Challenge of All: Changing Myself