Sigma
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
It's cold outside.
外面很冷。
Why are you squealing, my friend?
朋友，你为什么要发出尖叫？
For nearly three and a half centuries she lay at the bottom of Stockholm harbour until her discovery in 1956.
这艘大船在斯德哥尔摩港口的海底躺了将近3个半世纪之后，直到1956年才被发现。