1、
Pigment is a substance that, like a dye, gives color to living and inanimate objects.
色素是一种物质, 就像梁料, 给予生物和非生物颜色.
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2、
How could something change from being substance to being a living thing, for example?
举个例子, 原来是属于物质的东西何以会变为有生命的物体?
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3、
The bacteria in water will proliferate by living on these organic substance.
水中虽有余氯,但有许多资料表明,自来水厂的水质从出厂到用户龙头呈降低趋势.
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