“硬水”用英语怎么说？

硬水使壶生水垢.Hard water furs the kettle.硬水使水壶生了垢.Hard water furred the kettle.经过加入碳酸钠能被软化的硬水,称为永硬水.Hard water which can be softened by adding sodium carbonate is called permanent hard water....

“硬水”的拼音为：yìng shuǐ...