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
Hello, how are you doing today?
你好， 今天怎么样？
To fish for a whale
捕鲸
I want my change.
我要找的零钱。