英语语法分析

The genesis of perthite is metasomatic.

条纹长石为交代成因。

Perthite is orthoclase or microcline and albite over the product, which is more than orthoclase or microcline albite.

条纹长石是正长石或微斜长石与钠长石交生的产物，其中正长石或微斜长石多于钠长石。