英文名称：Biological Calcium Carbonate分子式：CaCO3 分子量：100.09 简称：生物钙
...石球晶 - TNMSC 关键字: 生物碳酸钙；羟基磷灰石球晶；均匀沉淀法；十字消光[gap=905]Key words: biological calcium carbonate; hydroxyapatite spherulites; homogeneous precipitation method; cross extinction..
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然而，很多海洋生物的骨骼由一种叫作霰石的碳酸钙矿物变体组成。
In many marine creatures, however, the skeleton is composed of a mineral variety of calcium carbonate called aragonite.
在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。
The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.
某些生物无疑会繁盛，但是如果这一趋势继续下去，当它至少持续几十年后，蛤、贻贝、海螺和所有生有碳酸钙外壳的生物将生存困难。
Some will no doubt flourish, but if the trend continues, as it will for at least some decades, clams, mussels, conches and all creatures that grow shells made of calcium carbonate will struggle.
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