upper structure

例句：

1. 1. The engineer designed the newbuilding with an upper structure that was bothfunctional and aesthetically pleasing.
   工程师设计了这座新建筑，其上部结构既实用又美观。
2. 2. The upper structure of thebridge is made of steel, which makesit strong and durable.
   这座桥的上部结构由钢制成，这使得它既坚固又耐用。
3. 3. The upper structure of thehouse is made of wood, providing awarm and cozy living space.
   房子的上部结构由木制成，提供了一个温暖舒适的居住空间。