Fluctuating
v. 波动（fluctuate的ing形式）
✅ 同义词
🔴 反义词
🗣️ 情景例句
But first you have to smile.
但首先你得笑一笑。
It is not work that kills, but worry.
劳动不伤人，忧虑才伤人。
You've done very well and made lots of progress.
你功课学得很好，进步很大。