solid of light distribution

例句：

1. 1. The solid material is hard towork with.
   这种固体材料很难加工。
2. 2. Thesolid shape of the object is clear.
   物体的固体形状是清晰的。
3. 3. Thesolid structure of the buildingis strong.
   建筑物的固体结构很坚固。