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.
二氧化碳含量上升致使海洋酸化，对像有孔虫这样有碳酸钙外壳的生物体所产生的影响尤为致命。
Rising carbon dioxide levels acidify the ocean, which has a particularly devastating effect on organisms that have calcium carbonate shells, like Foraminifera.
珊瑚礁是由历代以浮游生物为食的小水螅所遗留下来的碳酸钙沉积物而形成的。
Coral reefs are formed by deposits of calcium carbonate left by successive generations of tiny polyps which feed off plankton.
石灰质鞭毛虫(coccolithophores)是一类覆盖在碳酸钙(粉笔的主要成分)岩石板状外壳上的微生物。
Coccolithophores are microorganisms that are covered in plate-like shells made out of calcium carbonate (chalk). The chalky shells reflect light, turning the ocean a milky turquoise color.
碳酸钙是世界上最广泛的生物矿物。
Calcium carbonate is the most widely used biomineral in the world.
珊瑚王国。货架的珊瑚环绕太平洋岛国帕劳。珊瑚，小生物体相关的海葵，分泌碳酸钙，其中一个外骨骼变硬，并随着时间的推移形成珊瑚礁。
Shelves of coral surround the Pacific island of Palau. Corals, small organisms related to anemones, secrete calcium carbonate, which hardens into an exoskeleton and over time forms reefs.
结论：碳酸钙泡腾颗粒的口服生物利用度高于碳酸钙片。
Conclusion: The bioavailability of calcium carbonate effervescent granules was higher than calcium carbonate tablet.
对生物成因碳酸钙而言，普遍认为其非晶的前驱体相是在生物有机大分子和无机离子共同作用下形成的。
In terms of biogenic calcium carbonate minerals, amorphous precursor phase is generally considered to be formed under the joint regulation of biological macromolecules and inorganic ions.
结果显示，多羧基的阴离子能够诱导形成非晶碳酸钙，并且这些非晶碳酸钙具有与生物成因非晶碳酸钙类似的组成。
The results showed that the multi-carbonate anions could induce the formation of ACC which had a similar composition to biogenic hydrous ACC.
结果显示，多羧基的阴离子能够诱导形成非晶碳酸钙，并且这些非晶碳酸钙具有与生物成因非晶碳酸钙类似的组成。
The results showed that the multi-carbonate anions could induce the formation of ACC which had a similar composition to biogenic hydrous ACC.
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