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1.TheyarebasedonatraditionofromanticliteraturegoingbackatleasttoancientGreece,inwhichthecentralthemeofloveservesasthetriggerforextraordinaryadventure.2.Thethemeofjealousyisprominent,withtheconclusionthatloverequirespatienceintimeofadversity.3.Astheeconomyshiftsfrommanufacturingtoservicesandelectroniccommerce,opportunitiesforwhite-collarcrimewillmultiply(乘，增多，繁衍，扩大)，whilethetechnologyneededtostopsuchcrimeswilllagbehind(落后).4.Oneobviousbenefitofsocialorganizationisdefense——bothpassiveandactive——frompredators.5.严峻的天气状况Severeweather6.Thecoffeeplantisparticularabout（fussyabout/pickyabout）temperature,andchangesofmorethan20degreesintwenty-fourhours,ortemperaturesofover70degreesFahrenheit,tendtohaveharmfuleffectsonproduction.7.The“how”questionsseektounderstandtheproximateorimmediatecausesunderlyingabehaviorataparticulartimeandplace.隐藏的，潜在的，根本的8.Overthecentury,severalfactorsincreasedlifeexpectancy,mostnotablyimprovementsinpublichealth,suchaspasteurizedmilk,sewers,andindoorplumbing.9.Advancesinmedicalpractice,includingtheuseofantibioticsandvaccinationsforchildhoodillnesses,madeitincreasinglylikelythatinfantswouldreachadulthood.10.Ontheonehand,increasedlifeexpectancyisasignofsocietalwellbeing(康乐，安宁，福利);ontheotherhand,anagingpopulationposeditsownsetofproblems.11.Nothinginthehistoryofmodernastronomyhasexcitedasmuchspeculation(思考，遐想，推测)astheobject,orevent,knownasablackhole.12.Theirfascinationliesinthewaytheirtremendousgravityaffectsnearbyspaceandtime.13.ForDewey,experiencecannotbeseparatedfromnaturebecauseallexperienceisrootedinnature.14.Deweyasserted(主张，坚定地断言)that…15.Themethodsandcurriculaofeducationmustmakethechild’sgrowththecentralconcern.16.Memoriesarealwaysnotreliable.Wetendtosimplyforgetanything——atbest,memoriesaresomewhatdistorted——iftimepastlongenough.17.Thereisnowayaroundthefactthat（毫无疑问）containers,shelters,andsupportsmustbefunctional.18.Theselawsareuniversalintheirapplication,regardlessofculturalbeliefs,geography,orclimate.19.Sensitivitytophysicallawsisthusanimportantconsiderationforthemakerofapplied-artobjects.Itisoftentakenforgrantedthatthisisalsotrueforthemakeroffine-artobjects.20.Theseareproblemsthatmustbeovercomebytheartistbecausetheytendtointrudeupon（破坏）hisorherconceptionofthework.21.Thatthisdevicewasanecessarystructuralcompromiseisclearfromthefactthatthecannonballquicklydisappearedwhensculptorslearnedhowtostrengthentheinternalstructureofastatuewithironbraces(ironbeingmuchstrongerthanbronze).22.Itwouldthereforenotbetoogreatanexaggerationtosaythatpractitionersofthefineartsworktoovercomethelimitationsoftheirmaterials,whereasthoseengagedintheappliedartsworkinconcertwiththeirmaterials.23.However,unlikethecasesofseaottersandpinnipeds(seals,sealions,andwalruses,whoselimbsarefunctionalbothonlandandatsea),itisnoteasytoenvision（想象）whatthefirstwhaleslookedlike.24.Missinguntilrecentlywerefossilsclearlyintermediate,ortransitional,betweenlandmammalsandcetaceans.（倒装）25.Thedeserts,whichalreadyoccupyapproximatelyafourthoftheEarth'slandsurface,haveinrecentdecadesbeenincreasingatanalarmingpace.26.Ithasbeenestimatedthatanadditionalone-fourthoftheEarth'slandsurfaceisthreatenedbythisprocess.27.Insomecasestheloosesoilisblowncompletelyaway,leavingastonysurface.Inothercases,thefinerparticlesmayberemoved,whilethesand-sizedparticlesareaccumulatedtoformmobilehillsorridgesofsand.28.Thereislittledoubt,however,thatdesertificationinmostareasresultsprimarilyfromhumanactivitiesratherthannaturalprocesses.29.susceptibleto（易受……影响的）windandwatererosion30.thepassage（经过，消逝）ofcenturiesormillennia31.Withtheadventofprojection,theviewer'srelationshipwiththeimagewasnolongerprivate,asithadbeenwithearlierpeepshowdevicessuchastheKinetoscopeandtheMutoscope,whichwasasimilarmachinethatreproducedmotionbymeansofsuccessiveimagesonindividualphotographiccardsinsteadofonstripsofcelluloid.32.Thoseindividualswhopossesscharacteristicsthatprovidethemwithanadvantageinthestruggleforexistencearemorelikelytosurviveandcontributetheirgenestothenextgeneration.33.Oneisthatpeople'scapacitytooutwitotherspecies,nottheiraggressiveness,appearstobethedominantfactorinhumansurvival.34.Somestudiessuggestthatcatharsisleadstoreductionsintensionandaloweredlikelihoodoffutureaggression.35.Supportingevidencecomesfromresearchshowingthataggressivepeopleoftendistortotherpeople'smotives.36.Asmastercraftworkers,theyimpartedtheknowledgeoftheirtradestoapprenticesandjourneymen.37.Factorylifenecessitated（使……成为必需）amoreregimentedschedule,whereworkbeganatthesoundofabellandworkerskeptmachinesgoingataconstantpace.38.Industrializationnotonlyproducedafundamentalchangeinthewayworkwasorganized;ittransformedtheverynatureofwork.39.Withthelossofpersonalfreedomalsocamethelossofstandinginthecommunity.40.Psychologicalresearchhasgivenrisetosomeinterestingfindingsconcerningthefacial-feedbackhypothesis.41.ThosequeriedrangedfromEuropeancollegestudentstomembersoftheFore.42.Moreover,peopleindiverseculturesrecognizetheemotionsmanifestedbythefacialexpressions.43.apparently44.auniversalsignof45.Insomewaysthesocialmakeup