The property of water of containing a relatively high concentration of dissolved calcium and magnesium salts; the amount or degree of this; cf. hard…
| 单词 | θ73980 |
| 释义 | the world > matter > liquid > water > [noun] > hardness or softness of (4) hardness1712 The property of water of containing a relatively high concentration of dissolved calcium and magnesium salts; the amount or degree of this; cf. hard… softness1712 The property of water of containing a relatively low concentration of dissolved calcium and magnesium salts; the amount or degree of this. Cf. soft… permanent hardness1870 hardness of water that cannot be removed by boiling. temporary hardness1895 temporary hardness, hardness of water that can be removed by boiling, because it is due to bicarbonates which are thereby precipitated; temporary star… |
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