metamorphism

例句：

1. 1. The metamorphic rocks are formed by the pressure and temperature changes during the Earth's crust formation.
   变质岩是在地球地壳形成过程中，由于压力和温度的变化而形成的。
2. 2. Metamorphic minerals can undergo significant chemical transformations during their transformation from one rocktype to another.
   在从一种岩石类型转变为另一种岩石类型的过程中，变质矿物会经历显著的化学变化。
3. 3. During the metamorphism process, minerals can change shape and composition, leading to a variety of new mineral forms.
   在变质过程中，矿物的形状和成分可以发生变化，从而形成多种新的矿物形态。