Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
Rules are meant to be followed, not broken.
规则制订出来是让人遵守，而不是让人破坏。
I'm pleased to hear about your wife having a baby.
我很荣幸得知你太太生了一个小宝宝。
Look, Gary!That policeman's waving to you.He wants you to stop.
瞧，加里！那个警察正朝你挥手呢。他要你停下来。