Coal is formed from the remains of freshwater plants.
煤是由淡水植物遗骸形成
。
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中国》第一季 Great civilizations and intensive settlement are hardly associated with the Amazon, yet this 4,000-mile-long South American river carries about 20 percent of the world's fresh water-more than the Mississippi, Nile, and Yangtze combined.
亚马逊河几乎从未与伟大
文明和密集聚居地这样
字眼关联在一起。然而,4000英里长
南美洲河流承载着
上20%
淡水——比密西西比河、尼罗河和长江
总和还多。