Pfd
abbr. 程序流程图（Process Flow Diagram）；主飞行显示（Primary Flight Display）；个人漂浮设备（Personal Flotation Device）
🗣️ 情景例句
Don't worry about it. It's nothing.
别担心，没事儿。
I will go with him if he asks me.
我会和他走，假如他要求我的话。
It is no use offering the manual labourer, tired out with a hard week's sweat and effort,
对于流汗出力干了一周苦活的体力劳动者来说，是不合适的；