“water softening”的概念、定义、翻译、参考文献-科学参考

单词	water softening
释义	water softening [`wȯd·ǝr ´sȯf·ǝ·niŋ] ^CHEMISTRY Removal of scale-forming calcium and magnesium ions from hard water, or replacing them by the more soluble sodium ions; can be done by chemicals or ion exchange.
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