superstructure of track

例句：

1. 1. The architect designedthe new building with a focus on itssuperstructure.
   建筑师设计新建筑时，重点考虑了其超结构。
2. 2. The engineeranalyzed the superstructure to ensure its stability.
   工程师分析超结构以确保其稳定性。
3. 3. Theconstruction crew worked diligently tobuild the superstructure of the bridge.
   施工队努力工作，建造桥梁的超结构。