Methide
甲基化物
🗣️ 情景例句
Shells she sells on the seashore are seashells I am sure.
我敢肯定她在海边卖的贝壳是海贝。
In college I majored in science.What was your major?
在学院我主修了自然科学，你主修了什么？
Our school covers 100 square meters.
我们学校占地面积平方米。