Pfcs
abbr. 全氟化碳；全氟代烃类
🗣️ 情景例句
Or at least give him some advice.
再不然至少可以给他一些忠告。
Half the world knows not how the other half lives.
富人不知穷人苦。
If I get there early, I can see the doctor quickly, she thought.
“早到就能早看医生，”她想。