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1、Lesson3OverviewofEngineeringMechanicsTerminologyTexttour7/24/20211《机械工程专业英语教程》Terminology7/24/20212《机械工程专业英语教程》InteractiveActingorcapableofactingoneachother互相作用的或能互相作用的IterativeCharacterizedbyorinvolvingrepetition,recurrence,reiteration,orrepetitiousness重复的,反复的,]迭代的：以反复
2、、循环、重述或重复为特征的，或与之相关的Pinpoint精确地定位或确认Tolocateoridentifywithprecision精确地定位或确认《机械工程专业英语教程》7/24/2021EquilibriumAconditioninwhichallactinginfluencesarecanceledbyothers,resultinginastable,balanced,orunchangingsystem平衡，均衡：一种所有动作的影响都互相抵消，整个系统处于平稳的、均势的、不变的状态。TractableEasilyhandl
3、edorworked易于处理或操作的OrderofmagnitudeArangeofvaluesbetweenadesignatedlowervalueandanuppervaluetentimesaslarge,suchasthemassesofEarthandthesundifferbyfiveordersofmagnitude数量级：处于相差10倍的两个数值之间的那一段数值的范围。例如，地球与太阳的质量相差五个数量级。3Aswelookaroundusweseeaworldfullof“things”:Machines,devi
4、ces,tools;thingsthatwehavedesigned,built,andused;thingsmadeofwood,metals,ceramics,andplastics.Weknowfromexperiencethatsomethingsarebetterthanothers;theylastlonger,costless,arequieter,lookbetter,orareeasiertouse.《机械工程专业英语教程》7/24/2021Texttour4Ideally,however,everysuchite
5、mhasbeendesignedaccordingtosomesetof“functionalrequirements”asperceivedbythedesigners—thatis,ithasbeendesignedsoastoanswerthequestion,“Exactlywhatfunctionshoulditperform?”[1]1.soasto意为“使得，如此，以至于”。全句可译为：然而，在理想的情况下，每一件产品都是设计人员根据其对某些“功能要求”的理解而设计出来的，也就是说，在设计过程中，应该回答这样的问题，即“
6、它应该具有那种确切的功能？”《机械工程专业英语教程》7/24/20215(1)Thedevelopmentofanynewdevicerequiresaninteractive,iterativeconsiderationofform,size,materials,loads,durability,safety,andcost.(2)Whenadevicefails(unexpectedly)itisoftennecessarytocarryoutastudytopinpointthecauseoffailureandtoident
7、ifypotentialcorrectivemeasures.[2]2.carryout意为“进行，完成”，correctmeasure意为“改正措施”。全句可译为：当一个装置意外地失效后，通常需要进行研究工作，来找出失效的原因和确定可能的改正措施。《机械工程专业英语教程》7/24/20216Inany“real”problemthereisneversufficientgood,usefulinformation;weseldomknowtheactualloadsandoperatingconditionswithanypreci
8、sion,andtheanalysesareseldomexact.[3]Whileourmathematicsmaybeprecise,theoverallanalysisisgenerallyonlyapproxim
