2021英语四级听力:Sleep
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2021英语四级听力:Sleep思维导图模板大纲
Whyisitsodifficulttofallasleepwhenyouareovertired?Thereisnooneanswerthatappliestoeveryindividual.Itispossibletofeel“tired”physicallyandstillbeunabletofallasleep,becausewhileyourbodymaybeexhausted,youdonotfeelsleepy.Itisnotsoeasytosimply“turnoff”.
Lackofsleepcomplicatesmattersevenmore.Expertssayadultsneedatleastseventoeighthoursofsleepanighttofunctionproperly.Whenyougetlesssleepthanthatonconsecutivethreenights,youbegintoaccruefour“sleepdebt”.Assleepdebtincreasesyourbodyexperiencesastressresponse.Nowaviciouscyclehasbeencreated:Youexperiencethefeelingofbeingmoreandmoretired,butyourbodyisincreasinglystimulated.“Powersleeping”formorehoursonweekendsisonlyatemporarysolution.Thereisnosubstituteforgettingagoodnight’ssleeponaregularbasis.
UsefulWordsandExpressions:
1.overtire使过度疲劳
2.applyto将……应用于
3.consecutive连续的,连贯的
4.accrue自然增加,产生
5.vicious恶的
viciouscycle恶性循环
6.stimulate刺激,激励
7.substitutefor代替……,替换……