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 if you ask what I care about, I'll tell you.
……假如你们问我关心什么， 我可以告诉你们。
Don't forget to write to let us know you arrived safely.
不要忘记写信回来，告诉我们你已经安全抵达。
Two months later, some more money was sent to Sam with another note: 'Only 25 per cent a thief now!'
“这回只是25%的小偷了！”