inverse projection

例句：

1. 1.The inverse projection of the circle ontothe plane is a circle with center atthe origin and radius equal to the distancefrom the center to the projection.
   圆在平面上的反投影是一个以原点为中心、半径等于从中心到投影的距离的圆。
2. 2. Inverse projections are usedto find the best fit for a givenset of points on a surface.
   反投影用于找到给定一组点在表面上的最佳拟合。
3. 3. The inverse projection of the linesegment onto the plane is a line thatpasses through the midpoint of the segmentand intersects the plane at apoint equidistant from both endpoints.
   线段在平面上的反投影是一条通过线段中点的直线，且与平面上两个端点等距相交。