Polyacrylonitrile
n. [化]聚丙烯腈
🗣️ 情景例句
Well, that's life, isn't it?
这就是生活，不是吗？
How often did I tell you not to yell in the house?
我告诉你多少次不要在房子里大叫?
This is Jim.
他是吉姆，