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1、Unit1Structure1.1)Tohisgreatdelight,Dr.Dengdiscoveredtwogenesinwildricethatcanincreasetheyieldby30percent.2)Tohergreatrelief,herdaughterhadleftthebuildingbeforeitcollapsed.3)Toourdisappointment,ourwomen'steamlostouttotheNorthKoreans.4)Wethink,muchtoourregret,thatwewillnotbeabletovisityo
2、uduringthecomingChristmas.2.1)Thesebirdsnestinthevastswamps(whichlietothe)eastoftheNile.2)By1948,thePeople'sLiberationArmyhadgainedcontrolofthevastareasnorthoftheYangtzeRiver.3)MichellewasborninasmallvillageinthenorthofFrance,butcametoliveintheUnitedStatesattheageoffour.■4)TheColumbiaRi
3、verrisesinwesternCanadaandcontinues/runsthroughtheUnitedStatesforabout1,900kilometerswestoftheRockyMountains.II.TranslationTheoffensivehadalreadylastedthreedays,butwehadnotgainedmuchground.Ourtroopsengagingtheenemyatthefrontwerefacedwithstrong/fierce/stiffresistance.Thedivisioncommander
4、instructedourbattaliontogetaroundtotherearoftheenemyandlaunchasurpriseattack.Todoso,however,wehadtocrossamarshlandandmanyofuswereafraidwemightgetboggeddowninthemud.Ourbattalioncommanderdecidedtotakeagamble.Westartedundercoverofdarknessandpressedoninspiteofgreatdifficulties.Byastrokeoflu
5、ck,thetemperatureatnightsuddenlydroppedtominus20degreesCelsiusandthemarshfrozeover.Thankstothecoldweather,wearrivedatourdestinationbeforedawnandbeganattackingtheenemyfromtherear.Thisturnedthetideofthebattle.Theenemy,caughtoffguard,soonsurrendered.Unit2II.TranslationAutomobileschangedthe
6、worldduringthe20thcentury,particularlyintheUnitedStatesandotherindustrializednations.Theyareindeedofgreatusetous,buttheyhavebroughtsomehazardsaswell,suchasnoiseandairpollution,andhighwayfatalities.Itisreportedthatautomo-bileaccidentsrankamongtheleadingcausesofdeathandinjurythroughoutthe
7、world.Fortu-natelymoderninnovatorsarereinventingtheautomobile.Newpropulsionsystems,fuels,de-signs,andmeansofmanufacturingcarshavealldevelopedrapidlyinthepastdecade.Forex-ample,byusingthesatellite-aidedglobalpositioningsystem(GPS),acomputerintheautomobilecanlocatethevehicle'spre
