contact metamorphism of coal

例句：

1. 1. The process of contact metamorphism is crucial to the formation of oil and gas reservoirs.
   接触变质作用过程对于石油和天然气储集层的形成至关重要。
2. 2. The study of contact metamorphism helps us understand how rocks change under extreme conditions.
   接触变质作用的研究帮助我们理解岩石在极端条件下如何变化。
3. 3. The contact metamorphism of coal plays a significant role in the development of oil and gas resources.
   煤的接触变质作用在石油和天然气资源的形成中起着重要作用。