闪长岩

例句：

1. 1. The mineralogiststudied the composition of the rock.
   矿物学家研究了这种岩石的组成。
2. 2. Theigneous rocks are formed by the coolingand solidification of magma.
   岩浆岩是由岩浆冷却和凝固形成的。
3. 3.The pyroxene is a commonmineral in many types of rocks.
   辉石是许多类型岩石中的常见矿物。