There are other important markers in the lake sediments, including spherical carbon particles produced by the burning of fossil fuels in power plants and nitrates from the mass application of chemical fertilisers.

湖泊沉积物中还有其他重要的标志，包括发电厂燃烧化石燃料产生的球形碳颗粒和大量施用化肥产生的硝酸盐。

From Guatemala: Archaeologists studying charred lake sediments found evidence confirming a cryptic historical record saying the ancient Mayan city of Bahlam Jol burned on May 21, A.D. 697.

来自危地马拉：研究烧焦的湖泊沉积物的考古学家发现证据证实了一项神秘的历史记录，该记录称古玛雅城市 Bahlam Jol 于公元 5 月 21 日被烧毁。 697.

So these were all deposited in lake sediments, so they were subaqueous, and obviously there are a lot of animals living within the lake, particularly fish, and there's lots and lots of fish fossils in these beds.

所以这些都是沉积在湖泊沉积物中的，所以它们是水下的，显然湖里生活着很多动物，特别是鱼类，这些床上有很多很多的鱼类化石。