translation.en: And if we can understand how these chemicals get into the skeleton, we can then go back, collect fossil specimens, and reconstruct what the ocean used to look like in the past.
translation.zh: 如果我们可以理解 这些化学成分如何进入生物骨架， 我们就可以采集样本、回溯历史， 重现古代海洋的图景。