专业英语重点句子(带单词翻译版)

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1、Unit1(5个)1.Materialsscienceandengineering(MSE)isaninterdisciplinaryfieldconcernedwithinventingnewmaterialsandimprovingpreviouslyknownmaterialsbydevelopingadeeperunderstandingofthemicrostructure-composition-synthesis-processingrelationships.2.Materialsscientistsandengineersnoto

2、nlydealwiththedevelopmentofmaterials,butalsowiththesynthesisandprocessingofmaterialsandmanufacturingprocessesrelatedtotheproductionofcomponents.3.Oneofthemostimportantfunctionsofmaterialsscientistsandengineersistoestablishtherelationshipsbetweenamaterialoradevice’spropertiesan

3、dperformanceandthemicrostructureofthatmaterial,itscomposition,andthewaythematerialorthedevicewassynthesizedandprocessed.4.Inmaterialsscience,theemphasisisontheunderlyingrelationshipsbetweenthesynthesisandprocessing,structure,andpropertiesofmaterials.5.Inmaterialsengineering,th

4、efocusisonhowtotranslateortransformmaterialsintoausefuldeviceorstructure.Unit2（3个）6.WhatisalsofascinatingaboutvanderWaalsforcesisthattheybeginasinteractionsbetweenatomsandmoleculesthatultimatelyleadtoconsiderableforcesbetweenfineparticlesofanymaterial.7.Wemakeuseofmetalandcera

5、micpowders(dryorslurries)inprocessingmanyceramicandmetallicmaterialsthroughroutescollectivelyknownaspowderprocessing(Processingtechniqueformetalsinvolvingthesolid-statebondingofafinegrainedpowderintoafullydenseproduct).8.Wecanaccomplishthisbyintroducinglikechargesontheparticle

6、s(electrostaticstabilization)oradsorbingsoaplikesurfactantmoleculesonthesurfacesofparticles(stericstabilization).Unit3（8个）9.TheSi-ObondintheSiO44-structureinabout50percentcovalentand50percentionicaccordingtocalculationsfromPauling’sequation.10.ThetetrahedralcoordinationofSiO44

7、-satisfiesthedirectionalityrequirementofcovalentbondingandtheradiusratiorequirementofionicbonding.11.IftwocornersofeachSiO44-tetrahedronarebondedwiththecornersofothertetrahedra,achainorringstructurewiththeunitchemicalformulaofSiO32-results.9.Silicatesheetstructureformwhenthree

8、cornersinthesameplaneofasilicatetetrahedronarebondedtothecorn