那本书的第一章是我四年多以前写的。

I wrote that chapter over four years ago.

youdao

但有趣的是，现在我比以前写更多的文章了。

Interestingly, I write more now than ever before.

youdao

其中的道理我在以前写的著作中有详细的解释。

I have explained the reasons for it in details in the previous works I have written.

youdao

How can you write an original poem when your literary consciousness is essentially made up of the memory of all the things that you've read before?

你怎么能说自己写的是原创的诗,当你的文思,主要是由你以前阅读积累下的记忆,组合成的呢？

耶鲁公开课 - 弥尔顿课程节选

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

We can make some substitutions here using some of the derivation on the previous board which will give us the Planck constant divided by 2 pi mass of the electron times the Bohr radius.

在这里我们也可以,用我以前在黑板上写过的一些词来取代它,得到的是普朗克常数除以2π电子质量,再乘以波尔半径。

麻省理工公开课 - 固态化学导论课程节选