rib bed vault

例句：

1. 1. The architect designed a ribbed roof for the new building.
   建筑师为新建筑设计了一个拱形屋顶。
2. 2.The ribbed ceiling of the room is so smooth that it feels like silk.
   房间的拱形天花板如此光滑，感觉就像丝绸一样。
3. 3. The ribbed roof of the house provides excellent insulation against the cold winter months.
   房子的拱形屋顶在寒冷的冬季提供了出色的隔热效果。