Contracture occurs when the efflux of calcium is prevented by removing the extracellular sodium . 如果除去细胞外液的钠而阻止钙外流，就会出现肌肉挛缩了。
Losses of ca and mg are accelerated by fertilizers which supply nitrate, sulphate and chloride . 在施用硝酸盐、硫酸盐和氯化物的情况下会加速钙和镁的损失。
As more calcium was needed for building bone and blood, the calcium content of my milk soared . 由于制造骨骼和血液需要更多钙质，我奶里的钙含量就猛然增加。
One might anticipate that calcium efflux, like that of sodium, is mediated by an atp-dependent pump . 人们可以推测，钙的外流象钠一样是由ATP依赖的泵来完成。
This paradox may be resolved by determining the extent of interaction between calcium and magnesium . 这种自相矛盾的问题只有证实钙与镁之间的相互作用程度才能得到解决。
The elements are coprecipitated in bone in the ration of about 2 calcium: 1 phosphorus forming hydroxyapatite . 钙磷两种元素以约21的比例形成羟基磷灰石沉积在骨骼内。
The action of calcium as a protective agent against inimical ions is not a highly specific function . 钙作为一种保护剂以抗御有害离子的作用，并不表现高度的特效性功能。
It would appear that the inputs are insufficient to offset the mobilization and leaching of calcium from the topsoil . 钙的转入量看来不足以补偿从表土中活化和淋失的钙。
The development of sodium absorption capacity by aging beet slices, however, does not require calcium . 然而，随着甜菜薄片的衰老，要提高钠离子的吸收能力，已经无需钙参与作用了。
Sodium, sulfate, magnesium, calcium, carbonate, bicarbonate, chloride, and boron should be determined in a water analysis . 水质分析要测定钠、硫、镁、钙、碳酸盐、重碳酸盐、氯和硼的含量。
