Benedict 's solution is an alkaline solution of copper (ii) sulfate, which is reduced to insoluble copper (I) oxide by reducing sugars, giving a red precipitate.

本尼迪克特溶液是硫酸铜(二价)的堿性溶液，它可以通过还原糖被还原为不溶性的铜(一价)的氧化物，产生红色的沉淀物。

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Much deposition was found in the ditch of the main gallery of Daheiting Dam in 1988, including milky white, black and red brown precipitate.

大黑汀水库大坝主廊道于1988年发现在排水孔及排水沟内有大量的沉积物，分别为乳白色絮状物、黑色及红褐色物质。

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