projective special linear group

例句：

1. 1. The projective geometry of thespace is a fundamental concept in physics.
   空间的投影几何是物理学的一个基本概念。
2. 2. The projective transformations areused to map points onto a plane.
   投影变换用于将点映射到平面上。
3. 3.The projective view of the world isoften more accurate than the real-worldview.
   对世界的看法往往比现实更精确。