Polydiene
聚二烯
🗣️ 情景例句
My, what a downpour! And there doesn't seem to be any sign of its stopping.
哎呀，好大的雨呀！没有一点像要停的样子。
How long will I have to wait?
我要等候多久呢？
With all these mouths to feed, he didn't know what to do.
由于有那么多人要供养，他不知道怎么办才好。