rag slate

• 石板瓦

rag slate的用法和样例：

例句

1. A loose slate had fallen from the roof.
   一块松动的石板瓦从房顶上掉了下来。
2. The contract specifies red tiles, not slate, for the roof.
   合同中规定屋顶要用红瓦而不用石板瓦。