Cooxidation
共氧化
🗣️ 情景例句
Littering is a serious offense in some countries.
乱扔垃圾在某些国家是严重的违法。
This small table is good.
这张小桌很不错。
The English and Maths papers weren't easy enough for me.
英语和数学试题对我来说不很容易。