Moderninventionshavespeededuppeople’slivesamazingly.Mot...
問題詳情：Moderninventionshavespeededuppeople’slivesamazingly.Motor-carscoverahundredmilesinlittlemorethananhour.Aircraftcrosstheworldaday,whilecomputersoperateatlightningspeed.Indeed,thisloveofspeedse...