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1.The regional metamorphism of the rocks has led to the formation of new minerals.
岩石的区域变质作用导致了新矿物的形成。
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2. The study of regional metamorphism is crucial for understanding the Earth's history.
区域变质作用的研究对于理解地球的历史至关重要。
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3. The region experienced a significant period of regional metamorphism during the last ice age.
该地区在上一个冰河时期经历了一次显著的区域变质作用。