flat sphere pair

例句：

1. 1.The flat sphere is used to measure the distance between two points on a surface.
   扁平球体用于测量两个点之间的距离。
2. 2.Flat spheres are commonly used in manufacturing processes for their ability to withstand high pressures.
   扁平球体在制造过程中常被使用，因为它们能够承受高压。
3. 3.In a flat sphere pair, each sphere has a flat surface that can be used as a base for other objects.
   在扁平球体对中，每个球体都有一个平坦的表面，可以用作其他物体的基础。