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| 摘 要： | Thehistoryofhumanbeing'simaginationofflyingasabirdisaslongashumanbeing'shistoryitself.In1783,thehydrogenballoonflownbyaFrenchfellinthesuburbofParis,thelocalpeasantswerescaredterribly.Thisballoonhavinghistoricalsignificancewaspulledintopiecesbythehorseinthefield.Fortunately,inthebeginningof20thCentury,aviationturnedintoreality.OnDec.17th,1903,WrightbrotherssucceededinflyingtheirFlyerwhichwasman-operated,energy-pushedandheavierthanaitAlthough,Wrightbrothersonlyflewmorethan30meters,10secondsi… |
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