cupola shell

例句：

1. 1.The engineer designed a cupola shell for the new building.
   工程师为新建筑设计了一个穹顶。
2. 2.The construction of the cupola shell was completed ahead of schedule.
   穹顶结构的建设提前完成了。
3. 3. The cupola shell is used to provide ventilation in high-rise buildings.
   穹顶结构用于高层建筑的通风。