burnt shale

例句：

1. 1.The area around the volcano is home to a unique type of burnt shale.
   火山周围的地区有一种独特的烧过的页岩。
2. 2.The ancient city was buried under layers of burnt shale, making it difficult to excavate.
   这个古城被烧过的页岩层所覆盖，使得挖掘工作变得非常困难。
3. 3.The scientists used this material to create a new type of burnt shale that can withstand higher temperatures.
   科学家们利用这种材料制造了一种耐高温的新型烧过的页岩。