英汉词典在线查询

词形变化:

例句与用法:

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。

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