polygonal annular foundation

例句：

1. 1. The engineer designed a polygonal annular foundation for the new bridge.
   工程师为新桥设计了一个多边形环形基础。
2. 2. The construction of the foundation was crucial to the stability of the building.
   地基的建设对于建筑的稳定性至关重要。
3. 3. The foundation must be strong enough to support the weight of the building.
   地基必须足够坚固，以支撑建筑物的重量。