Polyvinylchloride
[医]聚氯乙烯：由氯化乙烯聚合所形成的一种化合物
🗣️ 情景例句
The instructions were not easily understandable.
这份说明书不容易理解。
Merry is he that hath nought to lose.
人无所失，不亦乐乎。
what would civilization be like without its benefits?
如果不受其惠，文明将会是个什么样子呢？