Poly(acrylic acid)
[化] 聚丙烯酸
🗣️ 情景例句
Your new exercise class?
你的新健身班
I've realized that we should stop the pollution.
我明白必须阻止公害的原因了。
Broadly speaking, human beings may be divided into three classes: those who are toiled to death,
劳累至死的人、