Underfrequency
降低了的频率, 最低的频率, 低于额定频率
🗣️ 情景例句
We're off to the animal shelter.
我们这就去动物收容所。
His apology didn't seem sincere.
他的道歉看起来不是真诚的。
The Turners are going on a train. The conductor is coming round.
特纳一家人在火车上。列车员走过来。