Polyisoprenes
(polyisoprene 的复数) n.[化]聚异戊二烯
🗣️ 情景例句
Stop complaining.
别抱怨了。
I plan to be here for over a year.
我计划在这里住一年以上。
when the plane suddenly turned round and flew back to the airport.
这时飞机突然调转头来，飞回了机场。