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
I admire him for his success in business.
我佩服他事业有成。
If he doesn't accompany him, I will.
如果他不，我将陪伴他。
I wanted to get my ball.
我是想捡回我的球。