将原来岩石改变成为变质岩的这种作用称之为变质作用。

The process of change from any previously existing rocks into metamorphic rocks is called metamorphism.

youdao

将原来岩石改变成为变质岩的这种作用称之为变质作用。

The process of change from any previously existing rocks into metamorphic rocks is called metamorphism.

youdao