calcium

名词 calcium:

1. 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
   同义词：Ca, atomic number 20

1. 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
2. I have a slight calcium deficiency.
   我有点缺钙。
3. Calcium is beneficial to our bones.
   钙对我们的骨骼有益。
4. We need some calcium everyday.
   我们每天需要些钙。

cal.ci.um

n.Symbol Ca （名词）符号 Ca
A silvery, moderately hard metallic element that constitutes approximately 3 percent of the earth`s crust and is a basic component of most animals and plants. It occurs naturally in limestone, gypsum, and fluorite, and its compounds are used to make plaster, quicklime, Portland cement, and metallurgic and electronic materials. Atomic number 20; atomic weight 40.08; melting point 842 to 848=C; boiling point ,487=C; specific gravity .55; valence 2.See table at element
钙：一种银色的、硬度适中的金属元素，约占地壳中各种元素的百分之三，是多数动物和植物的基本组成物之一。自然存在于石灰石、石膏、氟石以及其它化合物之中，用于制造石膏、生石灰、硅酸盐水泥以及冶金和电子材料。原子序数20；原子量40.08；熔点842到848度；沸点,487度；比重.55；化学价2参见 element

来源：
Latin calx calc- [lime] * see calx
拉丁语 calx calc- [石灰] *参见 calx
-ium
-ium