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
Thank you for inviting me to you wedding.
谢谢你邀请我参加你们的婚礼。
I'm sure he will be able to find the place.
我确定他会找到那地方。
It's often windy in March.
3月里常常刮风。