彩神app大发快3官方Pupils attend scientific carnival at youth activity center in SW China's Guizhou

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Pupils view an intelligent robot during a scientific carnival at a youth activity center in Danzhai County, Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, Aug. 12, 2018. (Xinhua/Huang Xiaohai)

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