Catalyst activity
[化] 催化剂活性
🧩 词语组成解析
🗣️ 情景例句
I'm not hungry, I've been snacking all day.
我不饿，我一整天都在吃零食。
You give me the money. I'll get you the goods.
一手交钱，一手交货。
So today, people still do the same thing to each other.
所以，今天人们还在互相做同样的事情。