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
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
Industry is fortune's right hand, and frugality her left.
勤勉是幸运的右手，节约是幸运的左手。
Let 's go out and have a look at it.
走，我们去看看？