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
Haven't I seen you before?
我以前没见过你吗？
Don't answer back.
不要顶嘴。
Mr Shute was a farm worker, and he didn't have much money.
舒特先生是个农场工人，他挣不到很多钱。