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1、一、英译中（英文科技资料翻译）原文：Anoperatingsystemisthesoftwarewhichactsasaninterfacebetweenauserofacomputerandthecomputerhardware.Thepurposeofanoperatingsystemistoprovideanenvironmentinwhichausermayexecuteprogram.Theprimarygoalofanoperatingsystemisthustomakethecomputersystemconvenienttouse.Asecondarygoali
2、stousethecomputerhardwareinanefficientway.Wecanviewanoperatingsystemasaresourceallocator.Acomputersystemhasmanyresourceswhichmayberequiredtosolveaproblem:CPUtime,memoryspace,filestorage,input/output(I/O)devices,andsoon.Theoperatingsystemactsasthemanageroftheseresourcesandallocatesthemtospeci
3、ficprogramsandusersasnecessaryfortheirtasks.Sincetheremaybemany,possiblyconflicting,requestsforresources,theo/smustdecidewhichrequestsareallocatedresourcestooperatethecomputersystemfairlyandefficiently.Multimediameans,fromtheuser’sperspective,thatcomputerinformationcanberepresentedthroughaud
4、ioand/orvideo,inadditiontotext,image,graphicsandanimation.Theintegrationofthesemediaintothecomputerprovidesadditionalpossibilitiesfortheuseofcomputationalpowercurrentlyavailable(e.g.,forinteractivepresentationofhugeamountsofinformation).Furthermore,thesedatacanbetransmittedthoughcomputerandt
5、elecommunicationnetworks,whichimpliesapplicationsintheareasofinformationdistributionandcooperativework.Multimediaprovidesthepossibilityforaspectrumofnewapplications,manyofwhichareinplacetoday.Amultimediasystemdistinguishesitselffromothersystemsthroughseveralproperties.Weelaborateonthemostimp
6、ortantpropertiessuchascombinationofthemedia,media-independence,computercontrolandintegration.Noteveryarbitrarycombinationofmediajustifiestheusageofthetermmultimedia.Asimpletextprocessingprogramwithincorporatedimagesisoftencalledamultimediaapplicationbecausetwomediaareprocessedthroughoneprogr
7、am.Butoneshouldtalkaboutmultimediaonlywhenbothcontinuousanddiscretemediaareutilized.Atextprocessingprogramwithincorporatedimagesisthereforenotamultimediaapplication.Animportantaspectofdifferentmediaistheirlevelofindependencefromeachother.Ingeneral,
