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
They want to work.
他们想工作。
When a dog is drowning everyone offers him drink.
落井下石。
I think I'll throw away these newspapers.
我想我要扔了这些报纸。