名词
中文翻译：火石
同义词：
['igneous rock', 'volcanic ash']
例句：
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1.The pyroclasts are the remnants of the eruption.
火石是火山喷发后留下的残骸。
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2. The pyroclasts were scattered across the landscape.
火石被散布在了这片土地上。
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3. The pyroclasts have been studied for their potential as building materials.
火石作为建筑材料的研究已经展开。