- 问题详情:Moderninventionshavespeededuppeople’slivesamazingly.Motor-carscoverahundredmilesinlittlemorethananhour.Aircraftcrosstheworldaday,whilecomputersoperateatlightningspeed.Indeed,thisloveofspeedseemsnever-ending.Everyyearmotor-carsareproducedwhic...
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