The calcium carbonate settles to the sea floor.

碳酸钙沉入海底。

Among them, calcium carbonate washed away by continuously running water.

其中的碳酸钙会被流水带走。

Over time, these polyps generate rock-like skeletons made of calcium carbonate.

逐渐地，这些珊瑚虫长出形似石头，由碳酸钙组成的骨架。

Coral is made up of small colonial animals, with calcium carbonate skeletons.

珊瑚是由小型珊瑚虫及其碳酸钙骨骼聚集而成的。

The whiter ones are more rich in calcium carbonate which is indicative of forams.

白色的部分富含更多的碳酸钙，说明这里有孔虫。

Health departments often assess hardness by measuring the milligrams of calcium carbonate per liter.

卫生部门通常通过测量每升碳酸钙的毫克来评估硬度。

Pearls contain a mixture of protein and calcium carbonate secreted by certain types of molluscs.

珍珠是某些类型的软体动物分泌的碳酸钙同蛋白质一起构成的混合物。

And one of those minerals, calcium carbonate, happens to be a very useful building material.

其中一种矿物，碳酸钙，恰好是一种非常有用的建筑材料。

That activity in turn causes calcium carbonate to precipitate, an event known as a whiting.

这一过程反过来也引发了被称为whiting反应的碳酸钙沉淀形成。

If the concentration is high, shells sink deeper before their calcium carbonate dissolves.

如果浓度很高，壳将会在完全溶解之前沉得更深。

Moreover, as water travels through the ground it dissolves and picks up minerals, particularly calcium carbonate.

此外，当水穿过地面时，它会溶解并吸收矿物质，尤其是碳酸钙。

The dinosaur eggshell is composed of calcium carbonate, just like bird eggshells today, like some crocodilian eggs have this hard calcium carbonate eggshell.

恐龙蛋的蛋壳是由碳酸钙组成的，就像今天的鸟蛋和鳄鱼蛋一样，蛋壳都是由这种坚硬的碳酸钙组成的。

Also during that period, creatures with hard body parts such as shells made of calcium carbonate appeared.

同样是在那个时期，出现了具有坚硬的身体部位的生物，比如由碳酸钙生成的贝壳。

And the deep sea is under saturated in calcium carbonate, so it literally dissolved all the bones.

深海的碳酸钙饱和不足，所以它溶解了所有的骨头。

Every summer, as the surface waters warm, flakes of calcium carbonate precipitate out and drift to the bottom.

每年夏天，随着表层海水变暖，碳酸钙薄片沉淀出来，沉向海底。

Normal concrete is bound with Portland cement, which is made by roasting a mixture that includes limestone (calcium carbonate).

普通的混凝土与硅酸盐水泥结合在一起，硅酸盐水泥是通过焙烧含有石灰石的（碳酸钙）混合物制成。

Enough of such cyanobacterial work over enough time and eventually you get the Bahamas, built out of calcium carbonate.

需要足够多的这种蓝细菌在长时间里共同参与，最终才会有这个用碳酸钙建造起来的巴哈马群岛。

If you dissolve away an egg shell, which is rich in calcium carbonate, with an acid, like vinegar, it maintains its shape.

如果你用醋之类的酸溶解富含碳酸钙的蛋壳，它会保持其形状。

But at greater depths, the water isn't quite as saturated with calcium and carbonate, and thus calcium carbonate is easier to dissolve.

但在更深的地方，水里的钙和碳酸盐的饱和度不高，因此碳酸钙更容易溶解。

Hard corals create the reef by secreting calcium carbonate—or limestone, a type of rock, which gradually builds up into a solid structure.

硬珊瑚通过分泌碳酸钙来造礁，或称之为石灰岩，一种岩石类型，逐渐形成固体的结构。