这个望远镜的镜面采用了抛物面设计,能更好地聚焦光线。
The telescope's mirror has a ___paraboloid shape to enhance light focusing.
方程z = 2x² + 3y²定义了三维空间中的一个椭圆抛物面。
The equation z = 2x² + 3y² defines an elliptical ___paraboloid in 3D space.