最新英语sci写作的万能句型.docx

最新英语sci写作的万能句型.docx

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最新英语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.NopreviousstudyhasinvestigatedX

15.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......