1·In many marine creatures, however, the skeleton is composed of a mineral variety of calcium carbonate called aragonite.
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。
2·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.
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。
3·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.
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。
4·Many species of invertebrate have shells or skeletons made of calcium carbonate.
无脊椎类的好多物种有碳酸钙质的外壳或骨骼。
5·Meanwhile, calcium ions in the cement also absorb moisture and carbon dioxide, forming calcium carbonate -- the material found in seashells.
同时，水泥中的钙离子也会吸收水分和二氧化碳，形成碳酸钙——碳酸钙是贝壳的主要成分。
6·Many invertebrates have shells of calcium carbonate that bear evidence of the physical conditions in which they formed.
许多无脊椎动物的碳酸钙贝壳中可以找到其形成时自然条件的证据。
7·That is bad because many Marine creatures rely on shells made of calcium carbonate to protect themselves.
这是相当糟糕的，因为很多海洋生物生活在钙质碳酸盐的贝壳里以保护自己。
8·These calcium carbonate towers, called tufas, formed underwater in California's Mono Lake.
这些叫做石灰华的碳酸钙塔是在加州莫诺湖的水下形成的。
9·In reefs, the structure is big lumps of calcium carbonate on which things grow and around which they graze and hunt.
对于珊瑚礁而言，结构就是大块的碳酸钙礁石，一切都发生在礁石之上或周围。
10·The white cliffs of Dover, for example, are white because they contain limestone, or calcium carbonate.
比如，多佛的白色峭壁之所以为白色就是因为含有石灰岩或碳酸钙。