Sigma complex
[化] σ络合物
🧩 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
It seems I owe you an apology.
好像我该向你道个歉。
I gave her my address and she gave me hers.
我把我的地址给她，她也把她的给了我。[九六广州初中会考]
We have a problem.
出问题了。