Polydiolefin
聚二烯烃
🗣️ 情景例句
A murder occurred last night in this very district.
就在这个区昨晚发生了一起凶杀案。
May I have your name?
请问你姓名？
Do you think we will find a solution for the problem?
你认为我们会解决这个问题吗？