projective的用法和样例：
词汇搭配
- projective geometry [数]投影几何学...
- projective cover degree 投影盖度
- projective technique 投射技术
- projective total cover degree 投影总盖度
- projective coordinate 投影坐标
- projective space 射影空间
- projective drawing 投影画
- projective subspace 射影子空间
- projective geometry code 投影几何码prote...
- projective abundance 投影多度
