built-up roofing

例句：

1. 1.The new building has a built-up roofing system that is energy efficient.
   这座新建筑采用了一种节能的复合屋面系统。
2. 2.The old house had a built-up roofing that was in need of repair.
   这所老房子的复合屋面需要修理了。
3. 3.The engineer designed the building with a built-up roofing that would last for decades.
   工程师设计的建筑使用了可以持续数十年的复合屋面。