Pfi
abbr. power factor indicator 功率因数指示器
🗣️ 情景例句
And ... I know you can do it.
这……我知道你办得到。
A man without money is a bow without an arrow.
人无钱，犹如弓无箭。
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.
历史学家迄今认为日历是随农业的问世而出现的，因为当时人们面临着了解四季的实际需要，