Recently,asolarpowered(太陽能動力的)planetooktotheskyforthefi...
問題詳情:Recently,asolarpowered(太陽能動力的)planetooktotheskyforthefirsttime.Ithadpassedanimportanttestonthewaytotravelaroundtheworld.TheplanetookofffromanairportinSwitzerland(瑞士)at45kmanhour.Itslowlyros...