背景文字测试报-译林牛津必修1（最新）U3_文化背景.doc

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1、FatigueandRest    Scientistshavemadeaninterestingexperimentaboutfatigue.    Whenamuscleinthebodyworks,itproduceslacticacid,anditisthislacticthatmakesthemuscletired.    Fatigueisnotjustachemicalprocess(过程),itisalsoabiologicalprocess.Wecan’tjust"remove"fatigue；wemustallowt

2、hecellsofthebodytorest.Damagesmustberepaired,nervecellsofthebrainmustbe"recharged,"thejointsofthebodymustreplaceuseduplubricants.Sleepwillalwaysbenecessaryasawayofrestoringthebody’senergyafterfatigue.    However,apersonwhohasbeenworkinghardathisdeskforhoursmaynotwanttoli

3、edownatallwhenheistired.He’drathertakeawalk!Orwhenchildrencomehomefromschooltheywanttorunouttoplaynottoliedownandrest.    Thereasonisthatifonlyacertainpartofthebodyistriedthebestwaytomakethatpartfeelfreshagainistomakeotherpartsofthebodyactive!Wecanactuallyrestbymeansofac

4、tivity.Ofcourse,ifyouaretotallyexhausted,thebestthingtodoistogotosleep!第1页共1页