Solid geometry is much more difficult to learn than plane geometry.

立体几何比平面几何学起来要有难度得多.

Learning plane geometry well is the foundation of learning solid geometry well.

学好平面几何是学好立体几何的基础。

With vector's (a new tool of modern mathematics) being introduced into solid geometry, there arise some new ways of dealing with solid geometry problems.

向量这一现代数学新工具引入立体几何后处理立体几何问题，有了新方法、新途径。

This paper mainly utilizes the methods of formula, isometric transform, cut and complement, extremes and analyzing special section to calculate the volume in solid geometry.

文章探讨了用公式法、体积变换法、补法、值法、析特殊截面等方法求立体几何中几何体的体积。