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(190707) -- SYDNEY, July 7, 2019 (Xinhua) -- People watch a robot soccer competition at RoboCup 2019 in Sydney, Australia, July 7, 2019. (Xinhua/Bai Xuefei)
(190707) -- SYDNEY, July 7, 2019 (Xinhua) -- People watch a robot soccer competition at RoboCup 2019 in Sydney, Australia, July 7, 2019. (Xinhua/Bai Xuefei)