Polydiolefin
聚二烯烃
🗣️ 情景例句
Have fun and be careful.
好好玩，但小心点哦。
I wonder if it is possible to arrange shopping for us.
我想能否在我们访问结束时为我们安排一点时间购物。
Why do you keep asking me the same question?
你怎么又问我同样的问题？