Poly(vinyl fluoride)
[化] 聚氟乙烯
🗣️ 情景例句
This is a tough job.
这是一件困难的工作。
Never swap (or swop) horses while crossing the stream.
骑渡中流莫换马。（指危难时不宜做大变动）
I've no idea. What do you think?
我不知道。你想干啥？