Fluocarbon
氟代烃
🗣️ 情景例句
Grandpa, you are a terrific guy!
爷爷， 你真了不起！
Every country has its customs.
乡有乡俗。
I didn't have any supper, except a piece of bread, because I didn't feel very well.
晚餐我只吃了一片面包，别的什么也没吃，因为我觉得不舒服。