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1、英语流利说Level3.Unit1Part2作者：DingMingTimeZonesOurplanet,theEarth,isthe3rdplanetfromthesun.Itisabeautiful,rotatingsphere.Thesidefacingthesunisindaylight.Thesidefacingawayfromthesunisindarkness.Forexample,whenit'sdaytimeintheUS,it’snighttimeinChina.Infact,there’sa12-hourtimedifferencebet
2、weenBostonandshanghai.Whenit'smidnightinShanghai.It’snooninBoston.-----------------------------------------------------------------------------------------------TheEarthrotatesfromwesttoeast.Toknowwhichdirectioniseastorwest,watchthesun.Thesuntravelsthroughtheskyfromeasttowest.Thesu
3、ncomesupintheeastandgoesdowninthewest.Again,thisisbecausetheEarthrotates.Ittakes24hoursfortheEarthtomakeacompleterotation.Andthatisthelengthofoneday.-------------------------------------------------------------------------------------------------BecauseoftheEarth'srotation,theEarth
4、isdividedintotimezones.Somecountries,suchastheUs,haveseveraltimezones.Whenit's10aminNewYork.It’s7aminSanFrancisco.英语流利说EuropeandtheUSareseparatedbyseveraltimezones.Whenit's5:00pminParis,it’s11:00aminBoston.So,there'sasix-hourdifferencebetweenParisandBoston.Onelargecountry,China,has
5、justonetimezoneforthewholecountry.Asaresult,atthesametime,somepartsofthecountrycanbedarkandotherpartscanbelight.-------------------------------------------------------------------------------------------------AsyoutravelaroundtheEarth,thetimechanges.Thetimeofthedaydependsonyourloca
6、tionontheplanet.Whenyoutraveleastorwest,youmaycrossseveraltimezonesForexample,ifyoutravelfromBeijingtoLosAngeles,youcrosseighttimezonesThatmeanswhenit'snoononSundayinChina,it’s8:00pmonSaturdayinLosAngeles.Fortravelers,thismeansitcanbeverydifficulttosleepafteralongflightTheclockmays
7、ay8:00pm,butforyourbodyit'snoon.Thisiscalledjetlag.时差反应--------------------------------------------------------------------------------------------------Crossingseveraltimezonescausesjetlag.ItdependsonhowfareastorwestyoutravelBecauseoftheEarth'srotation,theEarthisdividedintotimezon
8、es.英语流利说Kim’smoviestardrea
