Perfluorokerosene (pfk)
[化] 全氟煤油
🗣️ 情景例句
This is Alexandra Pappas, and this is my grandson Robbie,
这是Alexandra Pappas ，这是我孙子Robbie
The best horse needs breaking, and the aptest child needs teaching.
玉不琢不成器。
It's a friendly competition.
这是一场友谊赛。