Olefinicpolymerization
[化] 烯烃聚合
🗣️ 情景例句
Do you know when the bus for the Summer Palace leave?
你知道到颐和园的车几点开吗？
The electric fan is out of order.
这电风扇出毛病了。
I don't know.I've already had my holiday this year.
我不知道。今年我已度过假了。