Arccotangent
un. 反余切
🗣️ 情景例句
Yeah.
是的。
This is my second trip to the United States, and I really enjoy staying here.
这是我第二次美国之行，我很喜欢这里。
Many of them have to wait six months for their goods.
许多顾客不得不等上半年才得到所需的商品。