projective system of topological groups

例句：

1. 1. Theprojective system is used to map thespatial relationships between objects.
   投影系统用于映射物体之间的空间关系。
2. 2. In mathematics,a projective system is a set ofpoints in space that can be mapped ontoanother set of points.
   在数学中，一个投影系统是空间中的一组点，这些点可以映射到另一组点上。
3. 3. The projective system is often usedin computer graphics to create realistic images.
   投影系统常用于计算机图形学中，以创建逼真的图像。