to change food in your stomach into substances that your body can use

I find that I don't digest meat easily. 我发现自己不容易消化肉食。

Sit still and allow your meal to digest. 静静地坐着，让胃里的食物消化消化。

to read or hear new information and take the necessary time to understand it

This chapter is so difficult to digest, I'll have to read it again later. 这一章不容易理解消化，稍后我还得再看一遍。

a short written report providing the most important parts of a larger piece of writing, or one containing recent news

A digest of the research findings is now available. 研究成果的简报已经出来了。

The company publishes a monthly digest of its activities. 该公司每月出一份活动简报。