【摘要】 钙是人体必不可少的化学元素 ,它在人体内的平衡若被破坏 ,则会影响骨骼、牙齿的发育和结构 ,并会导致相关的四十多种疾病更多还原

【Abstract】 Calcium is one of the necessary chemistry element.If the balance of its content is distroied,which will affect development and fabric of bones and teeth,moreover lead to more than forty correlated disease.更多还原