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1、《专业英语》课程作业学生姓名学号院系专业任课教师二Ｏ一五年六月6一、英译中（英文科技资料翻译）原文：Anoperatingsystemisthesoftwarewhichactsasaninterfacebetweenauserofacomputerandthecomputerhardware.Thepurposeofanoperatingsystemistoprovideanenvironmentinwhichausermayexecuteprogram.Theprimarygoalofanoperatingsystemisthus
2、tomakethecomputersystemconvenienttouse.Asecondarygoalistousethecomputerhardwareinanefficientway.Wecanviewanoperatingsystemasaresourceallocator.Acomputersystemhasmanyresourceswhichmayberequiredtosolveaproblem:CPUtime,memoryspace,filestorage,input/output(I/O)devices,andso
3、on.Theoperatingsystemactsasthemanageroftheseresourcesandallocatesthemtospecificprogramsandusersasnecessaryfortheirtasks.Sincetheremaybemany,possiblyconflicting,requestsforresources,theo/smustdecidewhichrequestsareallocatedresourcestooperatethecomputersystemfairlyandeffi
4、ciently.Multimediameans,fromtheuser’sperspective,thatcomputerinformationcanberepresentedthroughaudioand/orvideo,inadditiontotext,image,graphicsandanimation.Theintegrationofthesemediaintothecomputerprovidesadditionalpossibilitiesfortheuseofcomputationalpowercurrentlyavai
5、lable(e.g.,forinteractivepresentationofhugeamountsofinformation).Furthermore,thesedatacanbetransmittedthoughcomputerandtelecommunicationnetworks,whichimpliesapplicationsintheareasofinformationdistributionandcooperativework.Multimediaprovidesthepossibilityforaspectrumofn
6、ewapplications,manyofwhichareinplacetoday.Amultimediasystemdistinguishesitselffromothersystemsthroughseveralproperties.Weelaborateonthemostimportantpropertiessuchascombinationofthemedia,media-independence,computercontrolandintegration.Noteveryarbitrarycombinationofmedia
7、justifiestheusageofthetermmultimedia.Asimpletextprocessingprogramwithincorporatedimagesisoftencalledamultimediaapplicationbecausetwomediaareprocessedthroughoneprogram.Butoneshouldtalkaboutmultimediaonlywhenbothcontinuousanddiscretemediaareutilized.Atextprocessingprogram
8、withincorporatedimagesisthereforenotamultimediaapplication.Animportantaspectofdifferentmediaistheirlevelofinde
