Pfi
abbr. power factor indicator 功率因数指示器
🗣️ 情景例句
I hope you will excuse me.
希望你能原谅我。
Old wood is best to burn, old book to read.
老柴好烧，老书宜读。
Between 8:00 and 9:00.
8：00－9：00之间吧。