Fluctuating voltage
[电] 增减起伏电压
🧩 词语组成解析
v. 波动（fluctuate的ing形式）
🗣️ 情景例句
Wrap him in the blanket, Dad!
用毯子把他裹好， 爸爸！
Paul started with surprise when Jim tapped his shoulder.
当吉姆拍了保罗的肩膀时，保罗吓了一跳。
What's the matter with him?
他怎么啦？