porphyritic rock

例句：

1. 1.The rock is porphyritic, which means it has a lot of holes.
   这块石头是多孔的，意味着它有很多洞。
2. 2. The soil is rich in iron, making it porphyritic.
   土壤富含铁元素，因此它是多孔的。
3. 3.This type of rock is often found in areas with high iron content, such as the porphyritic rocks in the Himalayas.
   这种岩石通常在富含铁的地区发现，比如喜马拉雅山的多孔岩石。