内变质作用

例句：

1. 1. The process of mineral transformation isknown as mineral metamorphism.
   矿物转化过程被称为矿物变质作用。
2. 2. During the metamorphicprocess, rocks undergo significant changes in compositionand structure.
   在变质过程中，岩石会经历成分和结构的显著变化。
3. 3. Metamorphic rocksare often found in areas where therehas been a significant change in temperature orpressure.
   变质岩通常出现在温度或压力发生显著变化的地区。