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Pedestrians walk in University Duisburg-Essen amid snow in Duisburg, Germany, Jan. 30, 2019. A snowfall hit Duisburg on Wednesday. (Xinhua/Lian Zhen)
Pedestrians walk in University Duisburg-Essen amid snow in Duisburg, Germany, Jan. 30, 2019. A snowfall hit Duisburg on Wednesday. (Xinhua/Lian Zhen)