ortho-lignite

例句：

1. 1. The mineral ore is extracted from the earth's crust.
   这种矿物矿石是从地球的地壳中提取出来的。
2. 2. The crystal structure of ortho-lignite is unique and has been studied extensively.
   正长石的晶体结构独特，已经被广泛研究。
3. 3. The use of ortho-lignite in construction materials has increased due to its strength and durability.
   由于其强度和耐用性，正长石在建筑材料中的使用有所增加。