Quadratic residue
[计] 二次剩余
🧩 词语组成解析
a. 二次的\\nn. 二次方程式
🗣️ 情景例句
Great! It's a date.
太好了！ 就说定了。
What was the weather like yesterday?
象昨天一样的天气？
He gets out of the lift. Then he walks to a bus stop.
他走出电梯。然后步行到公共汽车站。