Poly(vinyl fluoride)
[化] 聚氟乙烯
🗣️ 情景例句
Do you remember
你记得
I wonder if you are on my side.
我不知道你是否站在我这边。
There are rare instances when justice almost ceases to be an abstract concept.
在个别情况下，正义不再是一种抽象概念。