機(jī)電專業(yè)英語(yǔ)第2版1Unit 1 Engineering Materials 工程材料

EngineeringMaterials

Unit1工程(gōngchéng)材料精品資料TestingBeforeClass：Whichstateofironhascommercialuse

(radio)精品資料EngineeringMaterials

NonmetallicmaterialsMetallicmaterials精品資料EngineeringMaterials

TranslationReadingMoreTranslatingSkillsText精品資料Inthedesignandmanufactureofaproduct,itisessentialthatthematerialandtheprocessbeunderstood.Materialsdifferwidelyinphysicalproperties,machinabilitycharacteristics,methodsofforming,andpossibleservicelife.Thedesignershouldconsiderthesefactsinselectinganeconomicalmaterialandaprocessthatisbestsuitedtotheproduct.Engineeringmaterialsareoftwobasictypes:metallicornonmetallic.Nonmetallicmaterialsarefurtherclassifiedasorganicorinorganicsubstances.Sincethereisaninfinitenumberofnonmetallicmaterialsaswellaspureandalloyedmetals,considerablestudyisnecessarytochoosetheappropriateone.精品資料Fewcommercialmaterialsexistaselementsinnature.Forexample,thenaturalcompoundsofmetals,suchasoxides,sulfides,orcarbonates,mustundergoasepara-tingorrefiningoperationbeforetheycanbefurtherprocessed.Onceseparated,theymusthaveanatomicstructurethatisstableatordinarytemperaturesoveraprolongedperiod.Inmetalworking,ironisthemostimportantnaturalelement.Ironhaslittlecommercialuseinitspurestate,butwhencombinedwithotherelementsintovariousalloysitbecomestheleadingengineeringmetal.Thenonferrousmetals,includingcop-per,tin,zinc,nickel,magnesium,aluminum,lead,andothersallplayanimportantpartinoureconomy;eachhasspecificpropertiesanduses.

精品資料

Manufacturingrequirestoolsandmachinesthatcanproduceeconomicallyandaccurately.Economydependsontheproperselectionofthemachineorprocessthatwillgiveasatisfactoryfinishedproduct,itsoptimumoperation,andmaximumperformanceoflaborandsupportfacilities.Theselectionisinfluencedbythequantityofitemstobeproduced.Usuallythereisonemachinebestsuitedforacertainoutput.精品資料Insmall-lotorjobshopmanufacturing,general-purposemachinessuchasthelathe,drillpress,andmillingmachinemayprovetobethebestbecausetheyareadaptable,havelowerinitialcost,requirelessmaintenance,andpossesstheflexibilitytomeetchangingconditions.However,aspecial-purposemachineshouldbeconsideredforlargequantitiesofastandardizedproduct.Amachinebuiltforonetypeofworkoroperation,suchasthegrindingofapistonorthesurfacingofacylinderhead,willdothejobwell,quickly,andatlowcostwithasemiskilledoperator.精品資料

Manyspecial-purposemachinesortoolsdifferfromthestandardtypeinthattheyhavebuiltintothemsomeoftheskilloftheoperator.Asimpleboltmaybeproducedoneitheralatheoranautomaticscrewmachine.Thelatheoperatormustknownotonlyhowtomaketheboltbutmustalsobesufficientlyskilledtooperatethemachine.Ontheautomaticmachinethesequenceofoperationsandmovementsoftoolsarecontrolledbycamsandstops,andeachitemproducedisidenticalwiththepreviousone.This"transferofskill"intothemachine,orautomation,allowslessskillfuloperatorsbutdoesrequiregreaterskillinsupervisionandmaintenance.Oftenitisuneconomicaltomakeamachinecompletelyautomatic,becausethecostmaybecomeprohibitive.精品資料Theselectionofthebestmachineorprocessforagivenproductrequiresknowledgeofproductionmethods.Factorsthatmustbeconsideredarevolumeofproduction,qual-ityofthefinishedproduct,andtheadvantagesandlimitationsoftheequipmentcapableofdoingthework.Mostpartscanbeproducedbyseveralmethods,butusuallythereisonewaythatismosteconomical.精品資料machinability[m?,?i:n?'bil?ti]n.可加工性，可切削性，機(jī)械加工性characteristic[,k?r?kt?'ristik]adj.典型的，特有的n.特征,特性metallic[mi't?lik,me-]adj.金屬的，含金屬的n.金屬纖維nonmetallic[,n?nmi't?lik]adj.非金屬的n.非金屬物質(zhì)organic[?:'ɡ?nik]adj.有機(jī)的,組織的,器官的infinite['infin?t]adj.無窮的，極大的n.無限，無窮大alloyed['?l?id,?'l-]adj.合金(héjīn)的；合鑄的；熔合的vt.將…鑄成合金(héjīn)appropriate[?'pr?uprieit,?'pr?upri?t]adj.適當(dāng)?shù)?合適的vt.占用,撥出commercial[k?'m?:??l]adj．商業(yè)上的，商業(yè)的n.商業(yè)廣告compound['k?mpaund,k?-]n.化合物vt.合成vi.和解adj.復(fù)合的oxide['?ksaid]n．氧化物，氧化層，氧化合物精品資料sulfide['s?lfaid]n．硫化物，含硫系列，硫醚carbonate['kɑ:b?neit]n．碳酸鹽vt.使充滿二氧化碳，使變成碳酸鹽undergo[,?nd?'ɡ?u]vt.經(jīng)歷，經(jīng)受；忍受prolonged[pr?u'l??d,-'l?:-]adj.延長(zhǎng)的，拖延(tuōyán)的，持續(xù)很久的iron['ai?n]n.鐵，熨斗；烙鐵adj.鐵的；剛強(qiáng)的optimum['?ptim?m]n．最佳效果,最適合條件adj.最適宜的influence['influ?ns]n.影響，勢(shì)力，有影響的人或事vt.影響；改變flexibility[,fleksi'biliti]n．機(jī)動(dòng)性，靈活性，適應(yīng)性cam[k?m]n.凸輪，偏心輪vt.給(機(jī)器)配置偏心輪supervision[,sju:p?'vi??n]n．監(jiān)督，管理；指導(dǎo)精品資料physicalproperties物理性質(zhì)atomicstructure原子結(jié)構(gòu)nonferrousmetal有色金屬(yǒusèjīnshǔ)small-lot小批量finishedproduct成品general-purpose普通用途special-purpose專用的，特殊用途的standardizedproduct【工程設(shè)計(jì)】標(biāo)準(zhǔn)化產(chǎn)品精品資料1.Sincethereisaninfi-nitenumberofnonmetallicmaterialsaswellaspureandalloyedmetals,considerablestudyisnecessarytochoosetheappropriateone.譯文：由于非金屬材料與純金屬和合金的種類一樣繁多(fánduō)，所以在選擇合適的材料時(shí)需要做大量的研究工作。說明：句中aswellas和…一樣，不但…而且；Sincethereisaninfi-nitenumberof…作原因狀語(yǔ)從句。tochoosetheappropriateone作目的狀語(yǔ)。considerable[k?n'sid?r?bl]adj.相當(dāng)大的；重要的，值得考慮的1）relatedphrases：considerableorders大量訂貨；considerabledamage相當(dāng)大損失2）Todrillthepropersizeholeinanexactlocationrequiresconsiderableskill.在準(zhǔn)確的位置上鉆一個(gè)尺寸正確的孔要求相當(dāng)?shù)募记伞?）Sheisawomanwithconsiderableculture.她是一個(gè)文化修養(yǎng)很高的女子。精品資料2.Forexample,thenaturalcompoundsofmetals,suchasoxides,sulfides,orcarbonates,mustundergoasepara-tingorrefiningoperationbeforetheycanbefurtherprocessed.譯文：自然金屬化合物如氧化物、硫化物和碳酸鹽在能夠進(jìn)行深加工前必須經(jīng)過(jīngguò)分離或提純。說明：句中suchas例如，before引導(dǎo)時(shí)間狀語(yǔ)從句。compound['k?mpaund,k?-]n.化合物vt.合成vi.和解adj.復(fù)合的1）Hecompoundedwater,sandandsoilandformedbricks.他將水、沙和土摻和一起做成磚。2）Itisthemostpervasivecompoundonearth.它是地球上最普遍的化合物。undergo[,?nd?'ɡ?u]vt.經(jīng)歷，經(jīng)受；忍受1）Thecityhasundergonemanychangesduringthelasttenyears.這個(gè)城市在過去十年中經(jīng)歷了很多變化。2）Theideamustundergothetestofexperiment.觀念必須經(jīng)得起實(shí)驗(yàn)的檢驗(yàn)。精品資料3.Economydependsontheproperselectionofthemachineorprocessthatwillgiveasatisfactoryfinishedproduct,itsoptimumoperation,andmaximumperformanceoflaborandsupportfacilities.譯文：要達(dá)到經(jīng)濟(jì)性要求，就要選擇合適的設(shè)備和工序，這樣可以得到理想的產(chǎn)品，還要有最佳的操作、高效的人工執(zhí)行和設(shè)備支持。說明：句中dependson取決于，依賴于；thatwillgiveasatisfactory…作結(jié)果狀語(yǔ)從句；itsoptimumoperation,andmaximum…作dependson的并列介詞賓語(yǔ)。process['pr?uses,'pr?-]vt.處理；加工；n.過程，進(jìn)行，方法，步驟；作用；程序；vi.列隊(duì)前進(jìn)；adj.經(jīng)過特殊加工（或處理）的1)relatedphrases：DesignProcess設(shè)計(jì)程序；irreversibleprocess不可逆過程；前處理preprocess。2）Processdataandreportresults.處理數(shù)據(jù)(shùjù)和報(bào)告結(jié)果。3）Bigcutterdiameter,highcuttingspeed,goodprocessquality.刀具直徑大，切割速度高，加工面質(zhì)量好。精品資料4.Theselectionisinfluencedbythequantityofitemstobeproduced.譯文：選擇受生產(chǎn)(shēngchǎn)批量的影響。說明：句中tobeproduced作items的后置定語(yǔ)。influence['influ?ns]n.影響；勢(shì)力；有影響的人或事vt.影響；改變1)relatedphrases：influencebasin影響范圍；Influencesurface影響面；shadeinfluence陰影效2）Bothdrinkingandsmokinghavegreatinfluenceonourhealth.喝酒和抽煙對(duì)我們的健康都有很大的影響。3）Youngpeoplearequicklyinfluencedbynewideas.年輕人很快地受到新思想的影響。精品資料5.Ontheautomaticmachinethesequenceofoperationsandmovementsoftoolsarecontrolledbycamsandstops,andeachitemproducedisidenticalwiththepreviousone.譯文(yìwén)：在自動(dòng)機(jī)床上，工具的操作和運(yùn)動(dòng)是由凸輪和制動(dòng)器來控制的，并且每一零件的生產(chǎn)過程都與前一個(gè)過程相同。說明：句中sequenceofoperation操作順序，作業(yè)程序；beidenticalwith與…相同/一致。1）Thenumberonthecardshouldbeidenticalwiththeoneonthechequebook.卡上的號(hào)碼應(yīng)該和支票簿上的相同。2）Thefanasshowedinthisdesigndrawingonlyindicatesitsinstallationposition.Whenthefanismounted,directionofairflowofthefanshouldbeidenticalwiththatrequiredinthisdrawing.本設(shè)計(jì)圖中所示的風(fēng)機(jī)僅表其安裝位置，風(fēng)機(jī)安裝時(shí)，應(yīng)注意風(fēng)機(jī)的氣流方向與本圖所要求的方向一致。精品資料6.This"transferofskill"intothemachine,orautomation,allowslessskillfuloperatorsbutdoesrequiregreaterskillinsupervisionandmaintenance.譯文：機(jī)器或自動(dòng)化生產(chǎn)中的這種“技能遷移”對(duì)操作者的技能熟練程度要求有所降低，但在監(jiān)督管理和維護(hù)(wéihù)方面要求更高。說明：transfer[tr?ns'f?:]n.轉(zhuǎn)讓；轉(zhuǎn)移vi.轉(zhuǎn)讓；轉(zhuǎn)移；轉(zhuǎn)學(xué)vt.轉(zhuǎn)讓；使轉(zhuǎn)移；傳遞；調(diào)任1)relatedphrases：datatransfer數(shù)據(jù)傳送；transferincome轉(zhuǎn)讓收入2）Technologytransfertothemainland.把技術(shù)轉(zhuǎn)移到大陸。3）Share,browse,access,transfer,organize,rename,copyormoveanyfilesandfoldersbetweenmobilephoneandcomputer!在手機(jī)和電腦之間共享，瀏覽，訪問，傳輸，組織，重命名，復(fù)制和移動(dòng)任何文件和文件夾！精品資料I.Fillintheblanksaccordingtothetextwiththewordsgivenbelow.Makechangesifnecessary.1.Thedesignershouldconsiderthese

inselectinganeconomicalmaterialandaprocessthatisbestsuitedtotheproduct.

2.

materialsarefurtherclassifiedasorganicorinorganicsubstances.

metallic,alloy,special-purpose,pure,fact,general-purpose,result,nonmetallic,standardfactsNonmetallic精品資料3.Ironhaslittlecommercialuseinits

state,butwhencombinedwithotherelementsintovarious

itbecomestheleadingengineeringmetal.4.Many

machinesortoolsdifferfromthe

typeinthattheyhavebuiltintothemsomeoftheskilloftheoperator.purealloysspecial-purposestandard精品資料II.TranslatethefollowingintoEnglish．1.材料在物理性能、機(jī)加工性能、成形方法以及使用壽命等方面(fāngmiàn)有很大不同。Materialsdifferwidelyinphysicalproperties,machinabilitycharacteristics,methodsofforming,andservicelife.2．天然金屬(jīnshǔ)化合物如氧化物、硫化物和碳酸鹽在能夠進(jìn)行深加工前必須經(jīng)過分離或提純。Thenaturalcompoundsofmetals,suchasoxides,sulfides,orcarbonates,mustundergoasepara-tingorrefiningoperationbeforetheycanbefurtherprocessed.精品資料3．在自動(dòng)機(jī)床上，工具的操作順序和運(yùn)動(dòng)是由凸輪和制動(dòng)器來控制的，并且每一零件的生產(chǎn)過程(guòchéng)都與前一個(gè)過程(guòchéng)相同。Ontheautomaticmachinethesequenceofoperationsandmovementsoftoolsarecontrolledbycamsandstops,andeachitemproducedisidenticalwiththepreviousone.精品資料翻譯是一種再創(chuàng)造，即譯者根據(jù)原作(yuánzuò)者的思想，用另一種語(yǔ)言表達(dá)出來。這就是要求譯者必須確切理解和掌握原作(yuánzuò)的內(nèi)容與含意，在確切理解的基礎(chǔ)上，很好地運(yùn)用譯文語(yǔ)言把原文內(nèi)涵通順流暢地再現(xiàn)給讀者。一、翻譯的標(biāo)準(zhǔn)科技英語(yǔ)的翻譯標(biāo)準(zhǔn)可概括為“忠實(shí)、通順”四個(gè)字。忠實(shí)，首先指忠實(shí)于原文內(nèi)容，譯者必須把原作(yuánzuò)的內(nèi)容完整而準(zhǔn)確的表達(dá)出來，不得任意發(fā)揮或增刪；忠實(shí)還指保持原作(yuánzuò)風(fēng)格，盡量表現(xiàn)其本來面目。通順，即指譯文語(yǔ)言必須通俗易懂，符合規(guī)范。忠實(shí)與通順是相輔相成的，缺一不可。忠實(shí)而不通順，讀者會(huì)看不懂；通順而不忠實(shí)，脫離原作(yuánzuò)的內(nèi)容與風(fēng)格，通順就失去了意義?？萍加⒄Z(yǔ)翻譯的標(biāo)準(zhǔn)(biāozhǔn)與方法精品資料例如：1.Theelectricresistanceismeasuredinohms.誤譯：電的反抗是用歐姆測(cè)量的。正譯：電阻的測(cè)量單位是歐姆。2.Allmetalsdonotconductelectricityequallywell.誤譯：全部金屬不導(dǎo)電得相等好。正譯：并非所有的金屬都同樣好地導(dǎo)電。3.Themomentthecircuitiscompleted,acurrentwillstartflowingthecoil.正譯：電路(diànlù)一旦接通，電流開始流向線圈。精品資料4.Somespecialalloysteelsshouldbeusedforsuchpartsbecausethealloyingelementsmakethemtougher,stronger,orharderthancarbonsteels.正譯：對(duì)這類零件可采用某些特殊的合金鋼，因?yàn)楹辖鹪啬芴岣咪摰捻g性、強(qiáng)度、硬度。從以上例句可以清楚的看到，不能任意刪改，并不是(bùshi)逐詞死譯；漢語(yǔ)譯文規(guī)范化，并非是離開原文隨意發(fā)揮。此外，還應(yīng)注意通用術(shù)語(yǔ)的譯法。比如，例1中的“電阻”已成為固定詞組，不能用別的譯法。精品資料二、翻譯的方法翻譯的方法一般來說有直譯（literaltranslation）和意譯（freetranslation）。直譯，即指“既忠實(shí)于原文內(nèi)容，又忠實(shí)于原文的形式”的翻譯。意譯，就是指忠實(shí)于原文的內(nèi)容，但不拘泥于原文的形式。翻譯時(shí)，我們應(yīng)靈活運(yùn)用上述(shàngshù)兩種方法，能直譯的就直譯，需要意譯的就意譯。因?yàn)閷?duì)同一個(gè)句子來說，有時(shí)并非只能用一種方法，所以我們可以交替使用或同時(shí)并用以上兩種方法。精品資料請(qǐng)看下面的句子:1.MilkyWay銀河（意譯）（不可直譯為：牛奶路）2.bull’seye靶心（意譯）（不可直譯為：牛眼睛）3.Newuseshavebeenfoundforoldmetals,andnewalloyshavebeenmadetosatisfynewdemands.老的金屬有了新用途，新的金屬被冶煉出來，以滿足新的需要（本句前半部分用了意譯法，后半部分用了直譯法）。4.Theabilitytoprogramthesedeviceswillmakeastudentaninvaluableassettothegrowingelectronicindustry.對(duì)這些器件編程的能力(nénglì)將使學(xué)生成為日益增長(zhǎng)的電子工業(yè)領(lǐng)域中的無價(jià)人才（這里asset原意為資產(chǎn)，我們根據(jù)上下文意譯成“人才”）。精品資料三、翻譯中的專業(yè)性特點(diǎn)科學(xué)技術(shù)本身的性質(zhì)要求科技英語(yǔ)與專業(yè)內(nèi)容相互配合，相互一致，這就決定了專業(yè)英語(yǔ)與普通英語(yǔ)有很大的差異。專業(yè)英語(yǔ)以其獨(dú)特的語(yǔ)體，明確表達(dá)作者在其專業(yè)方面的見解，其表達(dá)方式直截了當(dāng)，用詞簡(jiǎn)練。即使同一個(gè)詞，在不同學(xué)科的專業(yè)英語(yǔ)中，其涵義也是不同的。例如：1.Thecomputertookoveranimmenserangeoftasksfromworkersmusclesandbrains.誤譯：計(jì)算機(jī)代替了工人大量(dàliàng)的肌肉和大腦。正譯：計(jì)算機(jī)取代了工人大量(dàliàng)的體力和腦力勞動(dòng)。（這里musclesandbrains引申為“體力和腦力勞動(dòng)”。）精品資料2.Inanycaseworkdoesn’tincludetime,butpowerdoes.正譯：在任何情況(qíngkuàng)下，功不包括時(shí)間，但功率包括時(shí)間。（這里work，power在物理專業(yè)分別譯為“功”、“功率”。）3．Likechargesrepeleachotherwhileoppositechargesattracted.正譯：同性電荷相排斥，異性電荷相吸引。（charge含義有“負(fù)載、充電、充氣、電荷”，按專業(yè)知識(shí)理解為“電荷”。）從以上例句可知，專業(yè)英語(yǔ)專業(yè)性強(qiáng)，邏輯性強(qiáng)，翻譯要力求準(zhǔn)確、精練、正式。這不僅要求我們能熟練地運(yùn)用漢語(yǔ)表達(dá)方式，還要求具有較高的專業(yè)水平。精品資料FerrousandNon-ferrousMaterials超硬合金材料黑色金屬(hēisèjīngshǔ)材料陶瓷材料高速鋼刀具(dāojù)材料金剛石材料精品資料

FerrousandNon-ferrousMaterials

Metalsarefoundeverywhereinourlife.Theyareclassifiedintotwocategories,“ferrous”and“non-ferrous”metals.Ferrousmeansrelatingto,orcontainingironandnon-ferrousmeanshavingnoiron.Thesetwokindsofmetalscanbeusedtomanufactureanequallylargerangeofitems.精品資料NameAlloyofPropertiesUsesMildsteelCarbon0.1%-0.3%Iron99.9%-99.7%Tough.Hightensilestrength.Canbecase-hardened.RustsveryeasilyMostcommonmetalusedinschoolworkshops.Usedingeneralmetalproductsandengineering.HighcarbonsteelCarbon0.6%-1.4%Iron99.4%-98.6%Tough.CanbehardenedandtemperedCuttingtoolssuchasdrills.StainlesssteelIron,nickelandchromiumTough,resistanttorustingandstainingCutlery,medicalinstruments.CastironCarbon2%-6%Iron98%-94%Strongbutbrittle.Comprehensivestrengthveryhigh.Castings,manholecovers,engines.WroughtironAlmost100%ironFibrous,tough,ductile,resistanttorusting.Ornamentalgatesandrailings,notinmuchusetoday.Table1-1Someferrousmetalsandproperties

精品資料NameColourAlloyofPropertiesUsesCopperReddishbrownNotanalloyDuctile,canbebeatenintoshape.Conductselectricityandheat.Electricalwiring,tubing,kettles,bowls,pipes.BrassYellowMixtureofcopperandzinc.65%-35%mostcommonratioHard.Castsandmachineswell.Surfacetarnishes.Conductselectricity.Partsforelectricalfittings,ornaments.AluminumLightgreyAluminum95%Copper4%Manganese1%Ductile,soft,malleable,machineswell.Verylight.Windowframes,aircraft,kitchenware.SilverWhitishgreyMainlysilverbutalloyedwithcoppertogivesterlingsilverDuctile,malleable,solders,resistscorrosion.Jewellry,solders,ornaments.LeadBluishgrayNotanalloySoft,heavy,ductile,losesitssharpunderpressureSolders,Pipes,Batteries，Roofing.Table1-2Somenon-ferrousmetalsandproperties精品資料ferrous['fer?s]adj.[化學(xué)]亞鐵的；鐵的，含鐵的category['k?tiɡ?ri]n.種類，分類；范疇case-hardenedadj.表面硬化的；定型的；無情的temper['temp?]n.脾氣；（鋼等）回火；性情；傾向v.調(diào)和；使回火stain[stein]vt.沾污；給……著色vi.污染；被沾污n.污點(diǎn)；瑕疵cutlery['kQtl?ri]n.餐具；刀劍制造業(yè)；刀叉(dāochā)餐具chromium['kr?umj?m]n.[化學(xué)]鉻（24號(hào)元素，符號(hào)Cr）brittle['britl]adj.易碎的，脆弱的；易生氣的casting['kɑ:sti?]n.投擲；鑄造；鑄件v.投擲；鑄造；投向；扔掉manhole['m?nh?ul]n.人孔；檢修孔；檢查井wrought[r?:t]adj.鍛造的；加工的；精細(xì)的tubing['tju:bi?]n.管子；裝管v.把……裝管；使成管狀精品資料zinc[zi?k]vt.鍍鋅于……；用鋅處理n.鋅ornament['?:n?m?nt]n.裝飾；裝飾物；教堂用品vt.裝飾，修飾fibrous['faibr?s]adj.纖維的，纖維性的；纖維狀的ductile['d?ktail,-til]adj.易教導(dǎo)的；易延展的；柔軟malleable['m?li?bl]adj.可鍛的；有延展性的；易適應(yīng)的；可塑的aluminium[,?lju'minj?m]adj.鋁的n.鋁manganese['m??ɡ?,ni:s,,m??ɡ?'ni:z]n.[化]錳tarnish['tɑ:ni?]n.污點(diǎn)；無光澤vt.vi.玷污；使……失去光澤whitish['hwaiti?]adj.帶白色的；發(fā)白的sterling['st?:li?]adj.英幣的；純正的；純銀制的n.英國(guó)貨幣；標(biāo)準(zhǔn)(biāozhǔn)純銀solder['s?ld?]vi.焊接vt.焊接；使聯(lián)接在一起n.焊料；接合物bluish['blu:i?]adj.帶藍(lán)色的；有點(diǎn)藍(lán)的精品資料I.ScanthetablesagaintofindthefollowingfactsandtranslatethemintoChinese.

1.aferrousmetalusedtomakecuttingtools2.anon-ferrousmetalusedtomakepartsforelectricalfittings3.aferrousmetalusedtomakecutleryandmedicalinstruments鐵質(zhì)金屬(jīnshǔ)用于制造切削刀具非鐵質(zhì)金屬(jīnshǔ)用于制作電氣設(shè)備的零件鐵質(zhì)金屬用于制造刀叉餐具和醫(yī)療器械

精品資料I.ScanthetablesagaintofindthefollowingfactsandtranslatethemintoChinese.

4.anon-ferrousmetalusedtomakeelectricalwiring.5.ametalusedtomakemanholecovers6.anon-ferrousmetalusedtomakeaircraft非鐵質(zhì)金屬用于制作(zhìzuò)電線金屬(jīnshǔ)用于制造檢查井蓋非鐵質(zhì)金屬用于制作飛機(jī)

精品資料II．Studythefollowingsentenceaboutaluminumandaddextrainformationtoit.．Aluminumisusedtomakeaircraft,enginecomponentsandmanyitemsforthekitchen..

Aluminum,whichislight,soft,andductile,isusedtomakeaircraft,enginecomponents—forexample,cylinderheads—andmanyitemsforthekitchen,suchaspotsandbasins.

精品資料鐵質(zhì)材料和非鐵質(zhì)材料金屬在生活中隨處可見。金屬劃為兩大類：黑色金屬(含鐵金屬)和有色金屬(不含鐵金屬)。這兩類金屬的應(yīng)用廣泛(guǎngfàn)程度基本相同。精品資料名稱成分性能用途