Petroleum polymer
[机] 石油聚合物
🧩 词语组成解析
🗣️ 情景例句
You did the best you could.
你已经尽力而为了。
My hobby is collecting books.
我的嗜好是收集书籍。
I'm sorry, I don't know. You'd better ask that policeman.
对不起，我不知道。你最好问问那位警察。