quadratic Euclidean domain

例句：

1. 1.This quadratic equation has a unique solution.
   这个二次方程有一个独特的解。
2. 2. The quadratic function describes the behavior of a curve that is parabolic in shape.
   二次函数描述了形状为抛物线的曲线的行为。
3. 3.In mathematics, the quadratic equation is used to model the motion of objects under constant acceleration.
   在数学中，二次方程用于描述物体在恒定加速度下的运动。