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1、一、英译中(英文科技资料翻译)原文：Anoperatingsystemisthesoftwarewhichactsasaninterfacebetweenauserofacomputerandthecomputerhardware.Thepurposeofanoperatingsystemistoprovideanenvironmentinwhichausermayexecuteprogram.Theprimarygoalofanoperatingsystemisthustomakethecomputersystem
2、convenienttouse.Asecondarygoalistousethecomputerhardwareinanefficientway.Wecanviewanoperatingsystemasaresourceallocator.Acomputersystemhasmanyresourceswhichmayberequiredtosolveaproblem:CPUtime,memoryspace,filestorage,input/output(I/O)devices,andsoon.Theoperatin
3、gsystemactsasthemanageroftheseresourcesandallocatesthemtospecificprogramsandusersasnecessaryfortheirtasks.Sincetheremaybemany,possiblyconflicting，requestsforresources,theo/smustdecidewhichrequestsareallocatedresourcestooperatethecomputersystemfairlyandefficient
4、ly.Multimediameans,fromtheuser^sperspective,thatcomputerinformationcanberepresentedthroughaudioand/orvideo,inadditiontotext,image,graphicsandanimation・Theintegrationofthesemediaintothecomputerprovidesadditionalpossibilitiesfortheuseofcomputationalpowercurrently
5、available(e.g.,forinteractivepresentationofhugeamountsofinformation).Furthermore,thesedatacanbetransmittedthoughcomputerandtelecominunicationnetworks,whichimpliesapplicationsintheareasofinformationdistributionandcooperativework.Multiinediaprovidesthepossibility
6、foraspectrumofnewapplications,manyofwhichareinplacetoday・Amultimediasystemdistinguishesitselffromothersystemsthroughseveralproperties・Weelaborateonthemostimportantpropertiessuchascombinationofthemedia,media-independence,computercontrolandintegration.Noteveryarb
7、itrarycombinationofmediajustifiestheusageofthetermmultimedia.Asimpletextprocessingprogramwithincorporatedimagesisoftencalledamultimediaapplicationbecausetwomediaareprocessedthroughoneprogram.Butoneshouldtalkaboutmultimediaonlywhenbothcontinuousanddiscretemediaa
8、reutilized.Atextprocessingprogramwithincorporatedimagesisthereforenotamultimediaapplication.Animportantaspectofdifferentmediaistheirlevelofindependencefromeachother.Ingenera
