In this mini project, the student arranges objects in the 3D space. He also includes several specific details and forms each part neatly and correctly.

Sage，即SageMath，是深受欢迎的免费学习和研究工具。咱们用它来感性认识三维坐标系，因为生成基本几何形体如长方体，球体，圆锥，圆柱，轮胎形状非常便捷。