Fluocarbon
氟代烃
🗣️ 情景例句
Come forward.
到前面来。
I couldn't get through.
电话打不通。
While the battered car was moving away, Roy stopped his bus and telephoned the police.
当那辆被撞坏的车开走后，罗伊停下车，给警察挂了电话。