Arccotangent
un. 反余切
??? 情景例句
And that includes Susan.
包括Susan的。
Pride goes before destruction.
驕者必敗。
We are all very excited and are looking forward to the Olympic Games because they have never been held before in this country.
我們都非常激動，盼望著奧運會的到來，因為在這個國家里還從未舉辦過奧運會。