Underfrequency
降低了的频率, 最低的频率, 低于额定频率
🗣️ 情景例句
It really was a wonderful ceremony.
那真是一个美好的（结婚）典礼。
After meat, mustard.
雨后送伞。
We can't process your damage claim.
我们无法办理你的索赔。