Underfrequency
降低了的頻率, 最低的頻率, 低于額定頻率
??? 情景例句
Take your medicine like a man.
做一個男人，去接受磨練吧！
My brother used to speak French to me all the time.
我的兄弟過去總是對我說法語。
The porter went to fetch one and arrive back with the station master,
搬運(yùn)工跑回去取時刻表，同時請來了站長。