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In pics: botanic garden of Warsaw University Library

Source: Xinhua| 2018-04-23 15:42:03|Editor: ZX
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POLAND-WARSAW-LIBRARY

People walk at the roof garden of Warsaw University Library in Warsaw, Poland, on April 20, 2018. The botanic garden of Warsaw University Library is one of the largest roof gardens in Europe, covering over one hectare of area. (Xinhua/Jaap Arriens)

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