ACanadianuniversitystudenthasdonewhatLeonardodaVinci(達·...
問題詳情：ACanadianuniversitystudenthasdonewhatLeonardodaVinci(達·*奇)hadonlydreamtof:Pilotingahumanpowered“wing－flapping”plane!Calledanornithopter,andtheinspirationformodern－dayhelicopters,themachinew...