翻译一篇英语短文（悬赏30分）Howdoinventionsaffectpeople'slife?Therehavebeenmanygreatinventions,thingsthatchangedthewaywelive.Thefirstgreatinventionwasonethatisstillveryimportanttoday——thewheel.Thismadeiteasiertocarryheavythingsandtotravellongdistances.Forhundredsofyearsafterthattherewerefewinventionsthathadasmucheffectasthewheel.Thenintheearly1800'stheworldstartedtochanged.Therewaslittleunknownandleftintheworld,peopledidn'thavetoexploremuchanymore.Theybegantoworkinsteadtomakelifebetter.Inthesecondhalfofthe19thcenturymanygreatinventions.Thehelicopterin1909.Movieswithsoundin1926.Thecomputerin1928,andjetplanesin1930.Thiswasalsoatimewhenanewmaterialwasfirstmade.Nyloncamein1935.Itchangedthekindofclothespeoplewear.Bythistimemostpeoplehadaverygoodlife.Manhasadesiretoexploreagain.Theworldwasknowntomanbutthestarswerenot.Manbeganlookingforwaystogointospace.Russiamadethefirststep.ThentheUnitedStatestookastep.Sincethenothercountries,includingChinaandJapanmayhavemadetheirstepsintospace.In1969mantookhisbiggeststepfromtheearth.Americansfirstwalkedonthemoon.Thisisthecertainlyjustabeginningthought.Newinventionswillsomedayallowustodothingswehaveneveryetdreamedof.