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    calcium carbonate

    详细解释:【化】 碳酸钙
    【医】 碳酸钙

    英语解释:

    名词 calcium carbonate:

    a salt found in nature as chalk or calcite or aragonite or limestone

    例句:

    A smooth, lustrous, variously colored deposit, chiefly calcium carbonate, formed around a grain of sand or other foreign matter in the shells of certain mollusks and valued as a gem.珍珠在几种软体动物的贝壳中,围绕着一粒沙子或其他外来物质形成的一种光滑、有色泽、具有不同颜色且主要是碳酸钙的沉积物,被珍视为宝石