单词	alum shale
释义	alum shale noun variants or alum slate or less commonly 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 Word History First Known Use 1737, in the meaning defined above
随便看	choosiness choosinesses choosing choosing up choosy chop chop (down) chop and change chop block chop box chop dollar chop down chop hill chop logic chop mark chop off chop shop chop suey chop sueys chop up chop-block chop-blocked chop-blocking chop-blocks chop-cherry

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