Polybutadiene
[机] 聚丁二烯
🗣️ 情景例句
I'll try it.
我试试吧。
When did you find this book?
你什么时候找到这本书的？
It's my birthday, and I'm going to have a party. Didn't you know?
我的生日聚会，我计划举办一个聚会。你不知道吗？