Sigma
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
So you really don't see your way to get it down a bit?
你真的不能再降一点了吗？
You should wear a sweater, It's cold today.
你应该穿一件毛衣，因为今天很冷。
The people in the shop are very friendly.
商店里的人很友好。