呵呵~~ 答案就在文中的"For the last 70 million years, compression, erosion and ice have sculpted the Rocky Mountains to their present formation, but the geology that created this impressive mountain range has also the potential to destroy it. "你知道在哪里吗?
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呵呵~~ 答案就在文中的"For the last 70 million years, compression, erosion and ice have sculpted the Rocky Mountains to their present formation, but the geology that created this impressive mountain range has also the potential to destroy it. "你知道在哪里吗?