A binary compound consisting of carbon and a more electropositive element, especially calcium.

碳化物一种二元化合物，由碳和一个电正性的元素，尤指钙，组成。

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Children need protein, vitamins, and minerals (especially calcium and phosphorous) to build strong teeth and to resist tooth decay and gum disease.

儿童需要蛋白质、各类维生素和矿物质(尤其是钙，磷)强健牙齿，抵御牙齿被腐蚀和预防牙龈疾病。

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Many older people, especially women, take calcium supplements to help keep their bones strong.

许多老年人，尤其是女的，喜欢补钙来保持骨骼健壮。

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