Arctan
反正切
🗣️ 情景例句
Tom doesn't enjoy going to school.
汤姆不喜欢上学。
In the multitude of counsellors there is safety.
谋士多，保安全。
I won't charge you this time.But you'd better not do it again!
这次我就不罚你款了。但你最好不要再开得这样快。