Unit 3 public attitudes toward science.ppt
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Unit 3 public attitudes toward science.ppt

Unit3publicattitudestowardscience.ppt

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Unit3publicattitudestowardscienceoutlinePre-readingquestionsAbouttheauthorStephenHawking(1942-):aBritishscientistwhohasgreatlyinfluencedpeople’sideasontheoriginsoftheuniverse.Hehasdevotedmuchofhislifetoprobingthespace-timedescribedbygeneralrelativityandthesingularities(奇异点)whereitbreaksdown.Andhe’sdonemostofhisworkwhileconfinedtoawheelchair,broughtonbytheprogressiveneurological(神经学方面的)disease.HawkingistheLucasianProfessorofMathematics(卢卡斯数学教授)atCambridge,apost(岗位)onceheldbyIsaacNewton.Inthe1960s,Hawkingprovedthatifgeneralrelativityistrueandtheuniverseisexpanding,asingularity(奇异点)musthaveoccurredatthebirthoftheuniverse.In1974hefirstrecognizedatrulyremarkablepropertyofblackholes,objectsfromwhichnothingwassupposedtobeabletoescape.HehaswrittentheinternationalbestsellerABriefHistoryofTime(时间简史).LanguagefocusLanguagefocusLanguagefocusLanguagefocusLanguagefocuslanguagefocusLanguagepointsLanguagefocusLanguagefocusLanguagefocusLanguagefocusLanguagefocusII.TranslationItishardtoimaginehowourforefatherscoulddowithoutsomanyconveniencesthatmoderntechnologyhasbroughtabout.Backthenonlyasmallproportionofthepopulationenjoyedsomecomforts.Themajoritydidn'tevenhavesufficientfood,nottospeakof/letalonetheprivilegeofbeingeducated.However,manypeopleblamemoderntechnologyfortheproblemsithascreated.Theywanttoslowdowntherateofprogress.Butnoonecanputtheclockback.Thebestwecandoistomakeinformeddecisionsastothedirectioninwhichtechnologyistodevelop.