Polyfluorocarbon
[化] 多氟烃; 多氟代烃
🗣️ 情景例句
It's a bet.
一言为定。
You live here in the city,don't you?
你出生在这个城市吗？
Sometimes I think this house will be knocked down by a passing plane.
有时我觉得这房子就要被一架飞过的飞机撞倒。