Sqrt
abbr. 开平方根（square root）
🗣️ 情景例句
A red sky at night indicates fine weather the following day.
晚上天边红预示着明早天气好。
A man may dig his grave with his teeth.
祸从口出。
They look young! Who's that man?
他们看上去好年轻啊！那个人是谁？