equidistant curve of hypocycloid

例句：

1. 1.The equidistant curve is a mathematical concept that describes the relationship between two points on a plane.
   等距曲线是描述平面上两点之间关系的数学概念。
2. 2.In physics, an equidistant curve is a line segment that passes through the center of a circle and divides it into two equal parts.
   在物理学中，等距曲线是一个穿过圆心并把圆分成两部分的线段。
3. 3. The equidistant curve is used in various fields, such as engineering, physics, and mathematics,to study the properties of curves and surfaces.
   等距曲线在工程、物理和数学等多个领域被用来研究曲线和曲面的性质。