Poly(vinyl fluoride)
[化] 聚氟乙烯
🗣️ 情景例句
Good. OK.
好的。
What are you going to do now?
现在你要做什么？
'We mustn't buy things we don't need,' I remarked suddenly.
“我们不应该买我们不需要的东西，”我突然发表意见说，