Polyfluorohydrocarbon
[化] 多氟烃; 多氟代烃
🗣️ 情景例句
Summer is vacation time.
夏季是度假的好时机。
Yes, and I hope we can have some snow this winter.
是的，我希望今年冬天会下雪。
May I have your attention please?
请大家注意一下。