凸面体

例句：

1. 1. Thecube has a cube-shaped face and is made of a cube-shaped material.
   这个立方体有一个立方体的面，由立方体材料制成。
2. 2.The carpenter used a rectangular board to make the car's body.
   木匠用一块矩形木板来制作汽车的车身。
3. 3. The shape of the object is determined by its geometry, which includes the properties of its surfaces.
   物体的形状由其几何属性决定，这包括其表面的性质。