hard vector surface

例句：

1. 1.The hard vector surface of the satellite is very smooth.
   卫星的硬向量表面非常光滑。
2. 2. The hard vector surface of the material is very strong.
   这种材料的硬向量表面非常强。
3. 3. The hard vector surface of the object can be used to reflect light.
   物体的硬向量表面可以用来反射光线。