Sinesoid
正弦曲线
🗣️ 情景例句
May I see you in my office?
你可以到我的办公室来一下么？
I'm really positive that this product has all the features you have always wanted.
我确信这种产品有各种你所要的款式。
He was astonished at what he found.
看到的情景使吃惊，