hard water中文什么意思

硬火

硬水

• hard:    adj. 1.硬的，坚固的 (opp ...
• water:    n. 1.水；雨水；露；〔常作 pl ...
• artificial hard water:    人造硬水

例句与用法

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1. Hard water furs the kettle .
   硬水使水壶生水垢。
2. Hard water which can be softened by adding sodium carbonate is called permanent hard water .
   经过加入碳酸钠能被软化的硬水，称为永硬水。
3. Study on softening of hard water by 13x - zeolite
   沸石用于硬水软化的研究
4. Household electrical appliances - performance - hard water testing
   家用电器.性能.硬水试验
5. Surface active agents - determination of stability in hard water
   表面活性剂.硬水中适应性测定

英文释义

名词

1. water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap