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1、英语科技论文写作 （四）2008.4.课堂练习PutthefollowingpassageintoEnglish.在气液和液液传质过程中，由于相界面上产生表面张力梯度和密度梯度，从而引发界面湍动。这是一种重要的流体力学不稳定现象，它能够影响传质速率，是提高传质效率的一个有效途径。自从20世纪60年代以来，人们对界面湍动进行了大量的研究工作，但大多数的实验还停留在现象观察阶段。鉴于此，本文建立了一套气液接触传质设备，研究引起界面湍动的Marangoni效应对传质系数的影响，为进一步的实验和理论研究提供有效的依据。Marangonieffe
2、ct;interfacialturbulence;surfacetension句型库_研究目的Thisproblemisconcerned(deals,bears)(chiefly,largely,mainly)with...Thisisaproblemrelatingto...Ourworkisdevotedto…Theprimarygoalofthepresentresearchis…Theworkpresentedinthispaperfocusesin…Thechiefaimofthisstudyis…Thelaboratory
3、studydemonstrates(suggests,indicates,reveals,establishes)…句型库_引言_研究目的Doingthiswork,weintend(hope,expect,attempt)to…Carryout(undertaking,initiating,performing)thisstudy,wehopeto…Theworkpresentedinthispaperfocusesonseveralaspectsof…Theprincipalpurpose(objective,task)ofthep
4、resent(further,preliminary)workistoinvestigatethefeaturesof(mechanismsinvolvedin,effectsproducedby…)句型库_引言_研究背景及历史Thisproblemwas(first)advancedby…Theproblemunderdiscussionwasformulated(raised,posed,broughtup,putforward)by…Sincethentheproblemhasattracted(fascinated)manysc
5、ientists(workersinthisfield).Thisproblemhasbeenclarified(elucidated,solved)…Theproblemascanbeseen(asisknown)is(still)poorly(inadequately)understood.句型库_引言_研究背景及历史Comparewiththecurrentresearch,thepreviousworkwasinconnectionwith…Theworkwearedoingiscloselyrelatedtothedelibe
6、rationsdescribedin…Thenewfindingsfromtheexperimentagreewellwiththeresultsobtainedin…Several(numerous,many,few)studiesaremade(carriedout,performed)toelucidatethenature(understandthebehavior,revealthecause)of…Astudyofthekindhas(never)beenmade(untilnow,untilafewyearsago).句型
7、库_引言_问题的难易Itseems(exceedingly,enormously)difficulttoobtainknowledgeoftheproblem…Itproves(quite,totally)impossible(unrealistic)totry…Itisratherdifficulttosolvetheproblem…Theproblemisratherinvolved.Theprobleminvolves(certain,tremendous)difficulties.Itiseasytopresent(review
8、,analyze,discuss)theprobleminallitscomplexity(inverydetail).Itisnoeasytasktogainaninsightintotheintrica
