banded porphyry

例句：

1. 1.The banded porphyry is atype of rock that has been formed overmillions of years.
   带纹辉长岩是一种经过数百万年形成的岩石。
2. 2. The banded porphyry is often used inconstruction because of its strength and durability.
   带纹辉长岩因其强度和耐用性而被广泛用于建筑。
3. 3. The banded porphyry was discovered in the area,and it is now being studied for itspotential use in mining.
   在该地区发现了带纹辉长岩，目前正在研究其潜在的采矿用途。