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外文翻译资料1WashingmachinesLet’slookinsideoneoftoday’sfullyautomaticwashingmachinesthatuseswirlingwatertocleantheclothes.TherearemanytypesofwashingmachinesbutthisFigureshowsyouwhatmostofthemarebasicallymadeupof.。Thereasonwhyawashingmachinelikethiscanwashandgetthewateroutoftheclothesatthesametimeisbecauseithasadoublelayerdrum.Whenwashingandrinsing,thepulsatorspinsandmakesthewaterswirl..Togetthewateroutoftheclothes,theinnerwallfthedrumspinsandthewatergoesthroughtheholes.Thesedays,the“centrifugalforcewashingmachines”arequitepopular.Thistypeofmachinedoesnotuseapulsator.Instead,theinnerwallspinsreallyquickly.Whenthedrumspins,thedirtyclothesgetstucktothewall.Thewaterand外文翻译资料2detergentalsotrytoescapethroughtheholesofthewallbutbeforetheydoso,theyareforcedtoescapethroughtheclothes.Whenthishappens,thepowerofthewateranddetergentremovesthedirtformtheclothes.Anothergoodthingaboutthistypeofmachineisthatclothesdon’tgettangledupsoyoudon’thavetoworryaboutyourclothesgettingrippedordamaged.Next,let’slookatsomedifferenttypesofwashingmachines!Manyofyouprobablythinkthatthewaterinsidewashingmachinesgoesroundandround.Actually,differentwashingmachinesmakewaterflowindifferentways.Whirlpooltype:ThistypeofwashingmachineusesapulsatortoforcethewatertomovelikeawhirlpoolinsidetheDrum.Thespinningwaterforcesthedirtoutformtheclothesinsidethemachine.Someofthenewermodelsofthistypealsomakethewhirlpoolmoveupanddowntomakeitcleanclothesevenbetter!AgitatorstirringtypeThistypeofwashingmachinehassomethingthatlookslikeapropelleratthebottomofthetub.ThisPropellerspinsaroundandstirsthewater.Thewaterthenforcesthedirtoutfromtheclothesinthemachine.Thegoodthingaboutthistypeofmachineisthatclothesdonotgettangledupandclothesgetevenlywashed.Drumtype:Thistypeofmachinehasadrumwithmanyholesinit.Therearealsoprotrusionsbumpsonthewallofthedrum.Asthedrumturns,theclothesarepickedupbytheprotrusions.Whentheclothesfalldownfromthetopofthedrumthroughthewater,themovementremovesdirtfromtheclothes.Centrifugalforcetype:Aswehavesaidbefore,thespinningdrumpushesthewateranddetergentout外文翻译资料3throughthewalloftheinnerdrum.Thepowerthatcomesformspinningthedrumiscalledcentrifugalforce.,whichiswherethenamecomesfrom.Thewaterisforcedthroughtheclothesandthentheholesintheinnerwall.Afteronecycle,thewaterisrecycledbackintothetankandtheprocessstartsagain.Thiscycleiswhatcleanstheclothes!InJapan,peoplefirststartedusingmachinesin1930.Butthenthepriceofawashingmachinewassohighthatmostaveragepersonscouldnotbuyonefortheirhomes.Lookingbacknow,therewassomethingstrangeandfunnyonsomeofthefirstversionsofthewashingmachine.Themachinehadtworollersthatwereusedtosandwicheachshirtandotherclothestosqueezethewateroutofthem.Therollerswereturnedbyhand,andinfact,youneededalotofstrengthtoturnthosethings!Still,peoplethenthoughtitwasareallyneatinvention!Thistypeofwatersqueezerwasusedforalmost30yearsuntilsomethingnewcamealong.Thespindrierthatused“centrifugalforce”togetmostofthewaterisoutoftheclothes.In1953,thenozzletypewashingmachinewasfirstsoldinJapan.Thiswashingmachineisliketheolderbrotheroftheswirlingwashingmachinethatyouseetoday.Thepriceofthesewashingmachineswaslowerandbecauseofthis,morepeopleboughtthem.Thefirstfullyautomaticwashingmachinewasintroducedin1968,andafterthat,washingclothesbecamealoteasiertodo!Therearealotofdifferenttypesofwashingmachines.Whatkindofwashingmachinedoyouhaveinyourhouse?Fullyautomatic:Thefullyautomaticmachinehastwodrumlayersthatwash,rinseandremovewaterfromclothestogether.Allyouhavetodoisadddetergentandputindirtyclothesandthenwashingmachinewilldotherest.Thereisalsoanewtypeoffully外文翻译资料4automaticwashingmachinethatcandryclothesaftertheyhavebeenwashed.Twintub:Thiswashingmachinehasonepartthatdosethewashingandanotherpartthatdoesthesqueezing.Eventhoughit’sahassletotaketheclothesoutandmovethemtoothertub,thegoodthingisthatyoucanwashandsqueezeatthesametimewithonemachine.Frontloading:Themainfeatureoffrontloadersisthattheyusealotlesswaterthanothertypes.ThisisthetypeofWashingmachinethatdrycleanersusebutalotofpeopleinwesterncountrieshavethistypeofwashingmachineintheirhomestoo.Let’strytomakethebestwashingmachineintheworld!Weshouldalreadythankthescientiststhatinventedthefullyautomaticwashingmachinebecauseitmakeswashingclothesapieceofcake.Scientistsarestilltryingreallyhardtofindwaystomakewashingmachinesalothandiertouseforeveryone.Someofthethingsthattheyaretryingtodoaretofindbetterwaysofmakingclothescleanandwaystomakewashingmachineslastlonger.Therearewashingmachineswithdtryingfunctiontodaysoyoudon’tevenhavetohangclothesafterwordsbecauseitdriesthemautomatically!Amazing!Scientistsarealsotryingtofindwaystouselesswaterandlessdetergentinwashingmachinesatpresent.Thisisbecausethatitisbettertouselesswaterforpreservingtheenvironment.Whatarewashingmachinesofthefuturegoingtobelike?Maybetherewillbeawashingmachinethatdriesandfoldsyourclothesafterwashingthem,ormaybetherewillbeonethatwillwashyourclotheswhileyouarestillwearingthem!Howhandywouldthatbe!Remember,ifthefirstwashingmachinewaslikeadreamtopeopleintheolddays,allthedreamsyo