英语词汇“alum shale”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	alum shale
释义	alum shale noun or alum slate also alum schist : a shale or clay slate originally containing pyrite and after weathering containing aluminum sulfate formed by the action of sulfuric acid from the decomposition of the pyrite on the aluminous materials of the rock
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