Fluctuations
n. 起伏现象；变动；波动（fluctuation的复数）
🗣️ 情景例句
I did , but everything is OK,so I decided to come back.
回去了， 但一切安好。于是我决定回来。
This dress is made of silk,isn't it?
这件衣服用丝绸做的，是吗？
No, you're doing fine.
不，你发音很好。