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
He appeared ill at ease at the party.
他在宴会上显得很拘谨。
I like to play tennis,but I'm not a very good player.
我喜欢打网球，但是我不是一个很好的运动员。
And, because most books were not printed in Braille.
因为大多数的书本没用布莱叶文印刷。