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 permanent hardness n (Chemistry) chem hardness of water that cannot be removed by boiling as it results mainly from the presence of calcium and magnesium chlorides and sulphates permanent hardness permanent hardness [′pər·mə·nənt ′härd·nəs] (chemistry) The hardness of water persisting after boiling.
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英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。