polyspire

例句：

1. 1. The polyspire inthe cave is a wonder of nature.
   洞穴中的多孔石是一个大自然的奇迹。
2. 2. Polyspires are often used as building materialsdue to their strength and durability.
   由于其强度和耐用性，多孔石常被用作建筑材料。
3. 3. The polyspire hasbeen found to have unique properties that makeit ideal for certain applications.
   这种多孔石被发现具有独特的性质，使其在特定应用中非常理想。