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1、一InformingtheWorld Everyday,thenewsoftheworldisrelayedtopeoplebyover300millioncopiesofdailypapers,over400millionradiosets,andover150milliontelevisionsets.Additionalnewsisshownbymotionpictures,intheatresandcinemasallovertheworld.Asmorepeoplelearnwhattheimportanteventsofth
2、edayare,fewerarestillconcernedexclusivelywiththeeventsoftheirownhousehold.AstheEnglishwriterJohnDonneputitnearlyfourhundredyearsago,"nomanisanisland."ThisideaismoreappropriatetodaythanitwaswhenDonnelived.Inshort,whereverhelives,amanbelongstosomesociety;andwearebecomingmor
3、eandmoreawarethatwhateverhappensinoneparticularsocietyaffects,somehow,thelifeanddestinyofallhumanity. Newspapershavebeenpublishedinthemodernworldforaboutfourhundredyears.MostofthenewspapersprintedtodayarereadinEuropeandNorthAmerica.However,soontheymaybereadinallpartsofth
4、eworld,thankstothenewinventionsthatarechangingthetechniquesofnewspaperpublishing. Electronicsandautomationhavemadeitpossibletoproducepicturesandtextfarmorequicklythanbefore.Photographicreproductioneliminatestheneedfortypeandprintingpresses.Andfewerspecialists,suchastype-
5、setters,areneededtoproduceapaperormagazinebythephoto-offset(照相平板胶印)method.Therefore,thepublishingofnewspapersandmagazinesbecomesmoreeconomical.Furthermore,photo-copiescanbesentovergreatdistancesnowbymeansoftelevisionchannelsandsatellitessuchasTelstar.Thus,picturescanbebro
6、ughttothepublicmorequicklythanpreviously. Machinesthatprepareprintedtextsforphoto-copiesarebeingusedagreatdealtoday.Thousandsoflettersandfiguresofdifferentsizesandthicknessescannowbearrangedonablackglassdiscthatisonlyeightinchesindiameter,tobeprintedinnegativeform(whiteo
7、nablackbackground).Thedisconthemachineturnsconstantlyattherateoftenrevolutionsasecond.Abeamoflightfromaslroboscopic(频闪的)lampshinesonthedesiredlettersandfiguresforaboutIwo-millionthsofasecond.Thentheimageofthelettersandfiguresthatwereilluminatedisprojectedontoafilmthroughl
8、enses.Thesectionoffilmislargeenoughtoholdtheequivalentofapageoftext.Thereisakeyboardinfrontofthe