Arccotangent
un. 反余切
🗣️ 情景例句
I couldn't have said it better.
我想说的也是这个意思。
He said he would rather not tell his age.
他说他不愿告诉年龄。
While I write my pen moves, but the paper keeps still.
我写字时，笔是移动的，纸是静止的。