stone polygon

例句：

1. 1.The stone polygon in the museum is very impressive.
   博物馆里的石多边形非常令人印象深刻。
2. 2.The construction of this bridge was a challenge for engineers due to its unique stone polygon design.
   由于其独特的石多边形设计，工程师们对这座桥梁的建设提出了挑战。
3. 3. The stone polygon on the top of the mountain is a symbol of the natural beauty of the area.
   山顶上的石多边形是该地区自然美景的象征。