They are a world of incessant activity... 这是一个不断运行的世界
They have inherited from those minuscule cyanobacteria... 他们继承了这些微小蓝细菌
They grow unhurriedly toward the sun that nourishes their foliage. 他们不慌不忙地向着太阳伸展着枝杈
They are the only natural element 他们是唯一不断向天空生长的
When they died, the shells sank... 他们死去以后 贝壳沉没
They grew their shells by tapping into carbon from the atmosphere... 他们通过吸收溶解在海洋中的大气碳元素
They reveal nearly two billion years of the earth's history. 它们揭示了近二十亿年的地球历史