Polydiolefin
聚二烯烃
🗣️ 情景例句
I have met some people from my country, which has helped me adjust a little.
我遇到了我的同胞，这让我更适应一些了。
How fast?
多快？
It's a fine day today, and everyone is busy.
今天的天气很好，大家都很忙。