Sigma bond
[化] σ键
🧩 词语组成解析
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
And I wonder if there are some balcony seats still available.
不知道还有没有包厢的位子？
You bet!
当然！
No, it's quite near.
不，很近。