【今年今期出什么马_今期六合菜开奖结果资料】Water quality of Erhai Lake improves with active treatment

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Villagers eliminate water plants in Erhai Lake in Dali, southwest China's Yunnan Province, Aug. 10, 2019. Water quality of Erhai Lake has improved with active treatment since the beginning of this year. (Xinhua/Qin Qing)

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