arched beam

例句：

1. 1. The bridge is supported by a series of arched beams.
   这座桥由一系列弓形梁支撑。
2. 2.The architect designed the building with an arched beam at the center.
   建筑师设计了一座建筑，其中心有一个拱形横梁。
3. 3. The engineer used arched beams to reinforce the structure.
   工程师使用拱形横梁加固了结构。