Pfas
abbr. personal fall arrest system 防坠落系统; [医][=performic acid-Schiff reaction]过氧甲酸-席夫反应
🗣️ 情景例句
Take care on your way back.
回程保重了。
Congratulations on your success in the election.
我恭喜你当选了。
I know. I can help him with most of his subjects.
我知道。我可以帮助他学习绝大多数科目。