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单词 soft water
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soft water
25. Of naturally occurring or treated water: containing relatively low concentrations of dissolved calcium and magnesium salts and thus lathering easily with soap. Frequently in soft water. Contrasted with hard adj. 19.
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the world > matter > liquid > water > [adjective] > properties or characteristics of water > not containing mineral
soft1691
unmineralized1757
freestone1805
1691 T. Tryon Wisdom's Dictates 146 Dry Pease being boiled in plenty of good soft Water, being seasoned with Salt and Butter, makes a substantial Dish of Food.
1733 Dugdale & P. Shaw tr. B. Varenius et al. Compl. Syst. Gen. Geogr. I. xvi. 322 The Elbe is a soft Water River, as we may call it, which..is owing to the clayey and fruitful Ground it washes [L. fluvii quorum aqua mollis seu pinguis est].
1755 Gentleman's Mag. Aug. 361/2 Keep this bason constantly filled with soft water.
1805 W. Saunders Treat. Mineral Waters (ed. 2) 3 River Water..is in general much softer and more free from earthy salts.
1893 Pall Mall Gaz. 30 Jan. 7/3 The tallest people in Great Britain are to be met with in soft-water districts.
1959 Which? Nov. 152/2 All the liquid and cream shampoos..would clean the hair effectively in hard or soft water.
1996 Sunday Times (Nexis) 4 Aug. A company has developed a unit that converts hard water into soft water, greatly reducing the build up of limescale in heating systems.
2006 J. M. Hornback Org. Chem. (Internat. Student ed.) xxiv. 1079 One application of such a cation exchange resin is to prepare soft water for cleaning purposes.
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