Poly(vinyl formal)
[化] 聚乙烯醇缩甲醛
🗣️ 情景例句
Mama, what are they doing to me? Help!
妈妈 ，他们在对我做什么？ 救命呀！
I don't know what I should have done without your help.
要不是您的帮助，我真不知道该怎么办。
The man on the motorbike was travelling too fast.
摩托车上的人开得太快。