八面体的

例句：

1. 1. The octahedron is a shape with eight equal triangular faces.
   八面体是一种具有八个等边三角形面的几何形状。
2. 2. Octahedral crystals are found in nature and have applications in many fields.
   八面体晶体自然存在，并在许多领域有应用。
3. 3. The octahedron has eight faces, each of which is a triangle.
   八面体有八个面，每个面都是一个三角形。