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1、Unit1Manhasabloodtiewithnatureandnobodycanliveoutsidenature.Natureprovidesuswitheverythingweneed:theairwebreathe,thewaterwedrink,andthefoodweeat.Forquitealongtimeaftermanbegantoliveintherealmofnature,helivedinfearofitsdestructiveforces.Heusedtoregardnaturewithitselem
2、entalforcesassomethinghostiletohim.Andeventheforestwassomethingwildandfrighteningtohim.Veryoften,hewasunabletoobtainthemerestdailynecessitiesthoughheworkedtogetherwithothersstubbornlyandcollectivelywithhisimperfecttools.Throughhisinteractionwithnature,manchangeditgra
3、dually.Hecutdownforest,cultivatedland,transferredvariousspeciesofplantsandanimalstodifferentclimaticconditions,changedtheshapeandclimateofhisenvironmentandtransformedplantsandanimals.Hesubduedanddisciplinedelectricityandcompelledittoservetheinterestsofsociety.Nonethe
4、less,withtheconstantexpansionofagricultureandindustry,manhasrobbednaturetoomuchofitsirreplaceableresources,pollutedhisownlivingenvironmentandcausedabout95%ofthespeciesthathaveexistedoverthepast600millionyearstobecomeextinctandstillmanyotherstobeendangered.Theprevious
5、dynamicbalancebetweenmanandnatureisonthevergeofbreakingdown.Manisnowfacedwiththeproblemofhowtostop,oratleasttomoderatethedestructiveeffectoftechnologyonnature.Thecrisisoftheecologicalsituationhasbecomeaglobalproblem.Thesolutiontotheproblemdependsonrationalandwiseorga
6、nizationbothofproductionitselfandcareforMotherNature.Thiscanonlybedonebyallhumanity,ratherthanbyindividuals,enterprisesorseparatecountries.1realm2elemental3obtain4stubbornly5transferred6transformed7subdued8expansion9irreplaceable10extinct11dynamic12verge13moderate14e
7、cological15rationalUnit2Technologyisa"hot"issuenowadays.Thedefendersoftechnologystressitsadvantageswhiletheopponentsemphasizeitsdisadvantages.Neithersidehasevertakenthetimetolookattheoppositepointofview.Thedefendersoftechnologyholdthatwithtechnology,people'slivingcon
8、ditionshavebeengreatlyimproved.Forexample,theboominproductivityhasmadegoodsbetterandcheaper.Therefore,thingsthatwereonceluxuries,su
