Arctangent
反正切
🗣️ 情景例句
My parents expect nothing but high marks.
我父母就希望我考高分。
Does the shop open at 9 am on weekdays?
这家店平日是早上9点开门吗？
I tried to wake up my wife by ringing the doorbell,
我按响了门铃，试图唤醒我的妻子，