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
Oh! I just drop in on him for a chat.
哦，我只是顺便来和他聊聊天。
The longest day has an end.
天下没有不散的盛筵。
and won't suffer sleepless nights over share prices.
不会因股票价格的浮动而夜不能眠。