Perfluorocarbon
全氟化碳
??? 情景例句
It's getting late, and we have a bit of a drive.
已經晚了， 而我們還要開好一段路呢。
May I ask you where you are from?
我能問你從哪里來嗎？
Mmm,it must be more delicious!
嗯，那一定更美味可口！