Sigma
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
Lillian and I were married two weeks ago in Detroit. Lillian
和我已经在两周前在Detroit结婚了。
The usher showed us to our seats.
领座员领我们到我们的位子。
If you have any questions on the details， feel free to ask.
如果对某些细节有意见的话，请提出来。