Sigma
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
You look great!
看起来很棒！
Don't look down on others!
别瞧不起人了。
A flight attendant would take charge of me and I never had an unpleasant experience.
我总是由一位空中乘务员照管，从未遇到过不愉快的经历。