Olefinicpolymerization
[化] 烯烃聚合
🗣️ 情景例句
Come on! You'll hear about it.
来吧， 来听听。
I'm the luckiest person in my class.
我是我的班级中最幸运的人。
Somebody's knocking at the door. I'll answer it.
有人在敲门，我去开。