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Solar vehicles participate in street parade on the last day of 2017 Bridgestone World Solar Challenge in Adelaide, Australia on Oct. 15, 2017. (Xinhua/2017 Bridgestone World Solar Challenge)
Solar vehicles participate in street parade on the last day of 2017 Bridgestone World Solar Challenge in Adelaide, Australia on Oct. 15, 2017. (Xinhua/2017 Bridgestone World Solar Challenge)