David Attenborough follows the remarkable story of the discovery of fossils in the Patagonia region of Argentina which prove to belong to the largest animal to ever walk the Earth. 译文(2): 大卫·艾登堡在阿根廷的巴塔哥尼亚地区发现了化石，这些化石被证明属于地球上有史以来最大的动物。
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