Sigma
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
What do you mean?
你是什么意思？
Take care of the pence, and the pounds will take care of themselves.
积少自然成多。
For one thing, when you earn money, you will not have to keep on asking your parents for money.
首先，当自己挣了钱，你就用不着老向父母要钱了。