Arcsec
abbr. arcsecant 反正割
🗣️ 情景例句
I want to thank you for placing such a big order with us. You won't be disappointed.
谢谢你下了这么大的订单，你一定不会失望的。
Excuse me, would you give me a hand?
对不起，你能帮我个忙吗？
What kind of problem.
什么样的问题呢？