Arccosine
反余弦
🗣️ 情景例句
And I talked with Mr. Marchetta. Did York make the offer?
我也和Marchrtta先生谈了。York是否跟你谈那个工作机会？
If you like.
如果您喜欢。
I heard some one laughing.
我听见有人在笑。