英语论文SCI写作的万能句型

文献简介1.RecentlyinvestigatorshaveexaminedtheeffectsofXonY.2.Inthepasttwodecadesanumberofresearchershavesoughttodetermine......3.Previousstudieshavereported......4.AconsiderableamountofliteraturehasbeenpublishedonX.Thesestudies......5.Smith(1984:217)showshow,inthepast,researchintoXwasmainlyconcernedwith.......6.SurveyssuchasthatconductedbySmith(1988)showedthat......7.ThefirstseriousdiscussionsandanalysesofXemergedduringthe1970swith......8.Recentevidencesuggeststhat.......9.Severalattempshavebeenmadeto......10.Anumberofresearchershavereported......11.XswerereportedinthefirstmodelsofY(e.g.,Smith,1977;Smith,&Patel,1977).12.WhatweknowaboutXislargelybaseduponempiricalstudiesthatinvestigatehow......StudiesofXshowtheimportanceof.....强调研究领域存在的问题1.However,theserapidchangesarehavingaseriouseffect......2.However,amajorproblemwiththiskindofapplicationis......3.LackofXhasexistedasahealthproblemformanyyears.Despiteitssafetyandefficacy,Xsuffersfromseveralmajordrawbacks:4.However,researchhasconsistentlyshownthatfirstyearstudentshavenotattainedanadequateunderstandingof......5.ThereisincreasingconcernthatsomeXsarebeingdisadvantaged......6.Despiteitslongclinicalsuccess,Xhasanumberofproblemsinuse.7.Questionshavebeenraisedaboutthesafetyofprolongeduseof......强调研究领域存在的争议1.Todatetherehasbeenlittleagreementonwhat......2.Morerecently,literaturehasemergedthatofferscontradictoryfindingsabout.....3.Oneobserverhasalreadydrawnattentiontotheparadoxin......4.InmanyXsadebateistakingplacebetweenYsandZsconcerning......5.ThecontroversyaboutscientificevidenceforXhasragedunabatedforoveracentury.6.Debatecontinuesaboutthebeststrategiesforthemanagementof......7.Thisconcepthasrecentlybeenchallengedby.......studiesdemonstrating.......强调研究领域的知识差距1.Sofar,however,therehasbeenlittlediscussionabout......2.LittleisknownaboutXanditisnotclearwhatfactors.......3.However,fartoolittleattentionhasbeenpaidto......4.Inaddition,noresearchhasbeenfoundthatsurveyed.......5.Sofarthismethodhasonlybeenappliedto......6.Thisindicatesaneedtounderstandthevariousperceptionsofpovertythatexistamong......7.However,theevidenceforthisrelationshipisinconclusive......8.WhatisnotyetclearistheimpactofXon......9.TheneurobiologicalbasisofthisXispoorlyunderstood.10.However,muchuncertaintystillexistsabouttherelationbetween......11.Untilrecently,therehasbeennoreliableevidencethat......12.However,therehavebeennocontrolledstudieswhichcomparedifferencesin......13.SeveralstudieshaveproducedestimatesofX(Smith,2002;Jones,2003),butthereisstillinsufficientdatafor.....14.NopreviousstudyhasinvestigatedX15.Althoughextensiveresearchhasbeencarriedouton....,nosinglestudyexistswhich......强调前人研究的不足之处1.MoststudiesinthefieldofXhaveonlyfocussedon......2.MoststudiesinXhaveonlybeencarriedoutinasmallnumberofareas.3.Thegeneralisabilityofmuchpublishedresearchonthisissueisproblematic.4.Theexperimentaldataarerathercontroversial,andthereisnogeneralagreementabout......5.Suchexpositionsareunsatisfactorybecausethey.....6.However,fewwritershavebeenabletodrawonanystructuredresearchintotheopinionsandattitudesof......7.TheresearchtodatehastendedtofocusonXratherthanY.8.TheexistingaccountsfailtoresolvethecontradictionbetweenXandY.9.ResearchershavenottreatedXinmuchdetail.10.PreviousstudiesofXhavenotdealtwith......11.Halfofthestudiesevaluatedfailedtospecifywhether......12.However,muchoftheresearchuptonowhasbeendescriptiveinnature....13.AlthoughextensiveresearchhasbeencarriedoutonX,nosinglestudyexistswhichadequatelycovers......14.However,theseresultswerebasedupondatafromover30yearsagoanditisunclearifthesedifferencesstillpersist.15.X'sanalysisdoesnottakeaccountof.....nordoesheexamine......重申研究目的1.PartoftheaimofthisprojectistodevelopsoftwarethatiscompatiblewithXoperatingsystem.2.Themainpurposeofthisstudyistodevelopanunderstandingof......3.Therearetwoprimaryaimsofthisstudy:1.Toinvestigate......2.Toascertain......4.Theaimofthisresearchprojecthasthereforebeentotryandestablishwhat......5.Theaimofthisstudyistoinvestigatethedifferencesbetween......6.Themainaimofthisinvestigationistoassessthedosesandrisksassociatedwith......7.Thisthesisintendstodeterminetheextenttowhich......andwhether.....8.Thisthesiswillexaminethewayinwhichthe.......9.ThisresearchexaminestheemergingroleofXinthecontextof......10.Thisdissertationseekstoexplainthedevelopmentof.......11.Thiscasestudyseekstoexaminethechangingnatureof.....12.DrawingupontwostandsofresearchintoX,thisstudyattemptsto......13.Theaimofthsstudyistoshinenewlightonthesedebatesthroughanexaminationof......14.Themajorobjectiveofthisstudywastoinvestigate......15.Onepurposeofthisstudywastoassesstheextenttowhichthesefactorswere......16.Theobjectivesofthisresearcharetodetermine......17.Thisstudythereforesetouttoassesstheeffectofmanagementby......,andtheeffectof......18.Thisstudysystematicallyreviewsthedatafor......,aimingtoprovideclaritysurroundingtheroleof.....研究问题/假设1.Thecentralquestioninthisdissertationaskshow......2.Inparticular,thisdissertationwillexaminesixmainresearchquestions:3.Thehypothesisthatwillbe