a roof with many protrusions的用法和样例：
- Crowned by a roof with upswept eaves, the Pavilion of the Old Drunkard looks simple and antique, but very stately too, with walls filled with many carved inscriptions.
- A shelter or shed having a roof with a single slope or pitch.
- Sky is obscure, like a roof with spider webs all round the old house.
- He covered over the hole in the roof with a piece of asphalt felt.