Fluocarbon
氟代烃
🗣️ 情景例句
He was carrying his son on his shoulders.l
他让儿子骑在肩上。
I'm not accustomed to that kind of social situation.
我不太习惯那种社交场合。
and still cannot fathom the exact outline of the vision before them.
站在镜前，不能辨认出自身的真面目。