Fluctuating current
[电] 增减起伏电流
🧩 词语组成解析
v. 波动（fluctuate的ing形式）
🗣️ 情景例句
Yes. About four years ago.
是的 ，大约四年前走的。
Please come in; you're right on time.
请进，你正好准时到来。
We're going to leave at about seven thirty next Monday morning.
我们打算下星期一早上7：30 左右出发。