concentric arch

例句：

1. 1. The construction of this bridge is designed to create a concentric arch.
   这座桥梁的设计旨在创造一个同心圆拱。
2. 2.The arches in the ceiling are made of marble and support the entire structure.
   天花板上的拱门由大理石制成，支撑整个结构。
3. 3. The archaeologists found evidence of ancient civilizations that were built around a central concentric arch.
   考古学家发现了围绕中心同心圆拱的古代文明的证据。