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一、引言段,1.Aproverbsays2.Astheproverbsays3.Generallyspeaking，4.Manypeopleoftenaskthisquestion,”5.Itisoftensaidthat,Itisclearthat,because7.Thedemandfor8.Asweallknow9.Ithasbeenfoundthat10.Nowthat11.Fromviewpoint,俗语说正如俗语所说一般来说很多人经常问这样的问题“”常言道显然因为对要求众所周知现已发现既然从观点,12.Itiseasytoseethat13.Overthelastmonths14.While15.Itissaidthat16.Inaccordancewithregardingare17.Forthepurposeof18.Asnoted19.Overtheyears20.Probably,21.Alongwiththedevelopmentsin,ariseincreasingconcernsto22.Thepiegraphshows23.Arecentsurveyprovides,显然在过去几个月虽然;当据说按照与有关的为了据说长期以来也许随着发展，人们对越来越关心图形统计表显示最近的调查提供了.,24.Itiswell-know25.Itgoeswithoutsaying26.Asawayofintroducing,itseemedthat27.Inspiteof28.Ofthetypesof29.Variousviewsexistasto30.Thechartshows31.Thepictorialgraphshows,众所周知无疑，在介绍.,看来尽管在这一类之中.对存在多种观点本表显示图表显示,WhatsmoreLastbutnottheleastForonething,foranotherTosumupInaword,
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