Pfcs
abbr. 全氟化碳；全氟代烃类
🗣️ 情景例句
Have gone to the railroad station.
去火车站。
She was disappointed by what Lawrence said.
她对劳伦斯说的话感到失望。
It is only in the study of man himself that the major social sciences have substituted the study of one local variation, that of Western civilization.
只是在对人类自身的研究中，各主要的社会学科才用对一个局部地区各种情况的研究（如对西方文明的研究）来代替对全人类的研究。