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File:The Hippopotamus at the Regents Park Zoo, ca. 1855.jpg
来自维基百科,自由的百科全书
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File:The Hippopotamus at the Regents Park Zoo, ca. 1855.jpg
publication date: 3 December 2010 operator: Flickr described
at
URL: https://www.flickr.com/photos/george_eastman_house/5229063953 sourcing