Arctan
反正切
🗣️ 情景例句
It was such a great idea to spend the weekend this way.
这样过周末的主意简直太棒了。
Would you tell Mr. Green that I called?
你能告诉格林先生我给他打了个电话吗？
Lucy, are you hungry?
露茜，你饿了吗？