Arccosecant
un. 反余割
🗣️ 情景例句
Thank you, Mr. Lu. Please wait a moment while I check our reservations list.
谢谢，陆先生。请稍等，我查一下订房名单。
Have you got that?
你明白我的意思吗？
Perhaps we van make it later.
那么，也许改天吧。