Sigma
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
I also applied to NYU.
我还申请了纽约大学。
In for a penny,in for a pound.
做事一开头，就要做到底；一不做，二不休。
You'd better find it quickly. Oh, too late.
你最好赶快找到它。啊，太迟了。