英语词汇permanent hardness怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

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 （无机盐在水中的）永久硬度。
随便看	non-disjunction non-dom non-drinker non-drip non-driver none non-empty nonentity none other than nones non-essential non est factum nonesuch nonet nonetheless none the less none the worse for none the worse for none too none too - non-Euclidean non-event no news is good news non-executive non-existence

英汉双解词典包含131075条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。