knee roof

例句：

1. 1. The old house had a knee roof that was falling apart.
   这座老房子有一个快要倒塌的膝盖屋顶。
2. 2.She climbed up the ladder to check the knee roof of the skyscraper.
   她爬上梯子检查那座摩天大楼的膝盖屋顶。
3. 3. The new apartment building has a modern knee roof design.
   新公寓楼采用了现代的膝盖屋顶设计。