n. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
常见例句
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calcium magnesium iron silicate
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n a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black
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a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate
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It is a hydrous silicate of calcium and potassium.
