cromfordite

例句：

1. 1. The cromfordite formation in the area is aunique geological feature.
   该地区的克罗姆福德岩是一种独特的地质特征。
2. 2. Thecromfordite has been used forcenturies as a building material.
   克罗姆福德岩被用作数百年来的建筑材料。
3. 3.The cromfordite was discovered duringa scientific expedition to the area.
   在对该地区进行科学考察时发现了克罗姆福德岩。