上部构造

例句：

1. 1. The engineer designed the building with an emphasis on its upper structure.
   工程师设计这座建筑时，特别注重其上部结构。
2. 2. The new car has a sleek upper structure that makes it look more advanced.
   这款新车拥有流畅的上部结构，看起来更先进。
3. 3. The construction of the bridge was completed in the upper structure.
   桥梁的建设工作在上部结构部分已经完成。