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A student tries to purify the water during a water cycling experiment at Binhe Experimental Primary School in Wuxi, east China's Jiangsu Province, March 22, 2019, which is the World Water Day. (Xinhua/Huan Yueliang)
A student tries to purify the water during a water cycling experiment at Binhe Experimental Primary School in Wuxi, east China's Jiangsu Province, March 22, 2019, which is the World Water Day. (Xinhua/Huan Yueliang)