英语词汇“permanent hardness”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	permanent hardness
释义	permanent hardness noun [mass noun] The presence in water of mineral salts (chiefly calcium sulphate) that are not removed by boiling.
随便看	nursle nursling nurts nurturable nurtural nurturance nurturant nurture nurtureless nurturer nurturist nurtz NUS nusach Nusas N.U.S.A.S. Nusayri nuse n'use nushnik nu skool Nusselt number nussiérite nusstorte nut

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