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1、大学英语精读第6册全文课文翻译THEQUESTFOREXTRATERRESTRIALINTELLIGENCEThroughallofourhistorywehaveponderedthestarsandmusedwhetherhumanityisuniqueorif,somewhereelseinthedarkofthenightsky,thereareotherbeingswhocontemplateandwonderaswedo,fellowthinkersinthecosmos.Suchbeingsmi
2、ghtviewthemselvesandtheuniversedifferently.Somewhereelsetheremightbeveryexoticbiologiesandtechnologiesandsocieties.Inacosmicsettingvastandoldbeyondordinaryhumanunderstanding,wearealittlelonely;andwepondertheultimatesignificance,ifany,ofourtinybutexquisitebl
3、ueplanet.Thesearchforextraterrestrialintelligenceisthesearchforagenerallyacceptablecosmiccontextforthehumanspecies.Inthedeepestsense,thesearchforextraterrestrialintelligenceisasearchforourselves.Inthelastfewyears--inone-millionththelifetimeofourspeciesonthi
4、splanet--wehaveachievedanextraordinarytechnologicalcapabilitywhichenablesustoseekoutunimaginablydistantcivilizationseveniftheyarenomoreadvancedthanwe.Thatcapabilityiscalledradioastronomyandinvolvessingleradiotelescopes,collectionsorarraysofradiotelescopes,s
5、ensitiveradiodetectors,advancedcomputersforprocessingreceiveddate,andtheimaginationandskillofdedicatedscientists.Radioastronomyhasinthelastdecadeopenedanewwindowonthephysicaluniverse.Itmayalso,ifwearewiseenoughtomaketheeffort,castaprofoundlightonthebiologic
6、aluniverse.Somescientistsworkingonthequestionofextraterrestrialintelligence,myselfamongthem,haveattemptedtoestimatethenumberofadvancedtechnicalcivilizations--definedoperationallyassocietiescapableofradioastronomy--intheMilkyWayGalaxy.Suchestimatesarelittleb
7、etterthanguesses.Theyrequireassigningnumericalvaluestoquantitiessuchasthenumbersandagesofstars;theabundanceofplanetarysystemsandthelikelihoodoftheoriginoflife,whichweknowlesswell;andtheprobabilityoftheevolutionofintelligentlifeandthelifetimeoftechnicalcivil
8、izations,aboutwhichweknowverylittleindeed.Whenwedothearithmetic,thesortsofnumberswecomeupwithare,characteristically,aroundamilliontechnical探寻外星人自从人类有历史记载以来，我们一直在思索着星星，反复考虑是否只有人类存在，或者说在太空深处的某个地方是否存在其他同我
