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
I ventured to correct the teacher's mistake.
我鼓起勇气去纠正老师的错误。
I imagine I'll do some work instead of going to the movies.
我想我将做一些工作而不是去看电影。
It's against the law.
这是违法的。