Part3MechanicalandElectricalEngineeringTechnology

1、Part Mechanical and Electrical Engineering Technology Unit 10Unit 11Unit 12Unit 13Unit 10Text Electro-engineering Elementsp Circuit and Its Ideal Circuit ComponentsoCircuit Classification1.Commonly Used Circuit Components p Simple Sinusoidal Alternating Circuit and Three-phase CircuitoSinusoidal Qua

2、ntity and Its Three FactorsoThree-phase Circuit o（1）When the transportation powers，voltages，distance and wiring losses are the same，the three-phase transportation electricity may save the consumed aluminum of the wireso（2）The three-phase asynchronous motor which is widely used in production industry

3、 and agriculture adopts three-phase alternating as power source. Compared with a single phase asynchronous motor，the type of motor has such advantage as simple structure，low cost，good capability and dependability. Since the three-phase power supply system has a series of advantages in the economy an

4、d technologies，presently，the majority of electric power systems in the world adopt the three-phase system New Words and Phrasesocircuits:kitn.電路oidealaidila.理想的ofunctionfknn.功能opassagepsidn.通道，路徑oassemblesemblv.聚集，集合，裝配opatternptnn.圖案，式樣ointermediate,intmi:dita.中間的n.中間體，媒介物oconnectionkneknn.聯(lián)系，連接oge

5、neration,denreinn.產(chǎn)生；代，時代oclassification,klsifikeinn.分類oprocessprsesvt.加工，處理n過程oamplification,mplifikeinn.擴大，放大 oshapingeipin.形成，整形ostoragestridn.儲存，儲存體odigitaldiditla.數(shù)碼的obatterybtrin.電池omagnitudemgnitju:dn.大?。ǔ潭壬希﹐magnetmgnitn.磁體，磁鐵osquareskwn.平方，數(shù)二次冪a.正方形的ofrequencyfri:kwnsin.頻率ooscillation,silei

6、nn.振蕩，振動oalternator:ltneitn.交流發(fā)電機opassivepsiva.被動的oinductanceindktnsn.感應(yīng)系數(shù)，自感應(yīng) ocapacitancekpsitnsn.電容oreflectriflektv.反映ophysicalfizikla.物理的ophenomenonfinminnn.現(xiàn)象opyrometricpirumetrika.高溫測量的oconsumeknsju:mv.消耗odecouplingdikplin.去耦合裝置oresistorrizisn.電阻器ocoilkiln.電線圈，繞組opartialp:la.部分的ocapacitorkpsit

7、n.電容器ofilterfiltn.濾波器，過濾器 orelayri:lein.繼電器omagneticmnetika.有磁性的ovoltaicvlteiika.電流的ocompensationkmpenseinn.補償ochoketukv.阻塞oelectronicilektrnika.電子的oproportionalprp:nla.成比例的,相對稱的osinusoidal,sainsidla.正弦的，正弦曲線的ovaluevlju:n.數(shù)值osinesainn.正弦otransformertnsf:m(r)n.變壓器outilizeju:tilaizv.利用 otransporttrnsp

8、:tv.運輸，輸送ogeneratordenreitn.發(fā)電機，發(fā)生器omeasureme.測量，量oinsulation,insjuleinn.絕緣體，絕緣oinstallation,instleinn.安裝，裝置oelectroengineeringilektru,endinirin.電氣工程，電機工程，電工學(xué)，電工技術(shù)oinstantaneous,instnteinjsa.瞬間的，即刻的osolesula.唯一的oamplitudemplitju:dn.物理振幅、波幅ophasefeizn.相，相位oelectromotiveilektrumutiva.起電的omutuallymju:t

9、uli,-tjuliad.相互地 odistribution,distribju:nn.分發(fā)，分配olosslsn.喪失，損耗oaluminum,ljuminimn.鋁oasynchronouseisikrnsa.異步的ocapability,keipbilitin.性能，容量omajoritymdritin.多數(shù)，大多數(shù)oelectric apparatus電氣設(shè)備oelectricity generation發(fā)電opower supply system供電系統(tǒng)oelectric drive電力拖動odirect current直流oalternating current交流 odirect

10、 current supply直流電源omains supply交流電源ocurrent supply電流源opyrometric effect熱效應(yīng)ocurrent limiting限流opressure release 降壓opartial pressure分壓odelayed relay延時繼電器omagnetic field磁場oyohaic wires導(dǎo)線omagnet core鐵芯oelectric field電場 olqlter circuit濾波電路ochoked軸w device阻流器odirectly proportional成正比的oturning circuit調(diào)諧電路

11、ocoupling circuit耦合電路odelayed circuit延時電路odecoupling resistor去耦電阻opower circuit電源電路oactive component有源元件opassive component無源元件oelectric installation 電氣設(shè)備opower supply system 供電系統(tǒng) o electromotive force 電動勢o electrical angle 電度角o threephase system 三相制o wiring loss 線路損失o power source 電源o a series of 一系

12、列的o sinosoidal function 正弦函數(shù)o power station 發(fā)電站，發(fā)電廠o simple sinusoidal alternating circuit 正弦交流電路 ExercisesIAnswers to the following questions according to the text.o1What is the definition of an electric circuit?o2What are the fundamental components of the circuit9o3What is the function of the elec

13、tric power circuit?o4List different types of circuito5What do commonlyused passive units contain?o6What is the definition of the simple sinusoidal alternating circuit?o7What are the three factors of sinusoidal voltage?o8Why is the sinusoidal quantity widely used in electroengineering?o9List the adva

14、ntages of the threephase alternating compared with the single phase alternatingo10What is the definition of the threephase circuit? Match the words in column A with the explanations in column B.oA BoLoad 電壓oVoltage 負荷oCapacitance 限流ocurrent limiting 分壓opressure release 調(diào)諧電路opartial pressure 濾波電路ofil

15、ter circuit 耦合電路oturning circuit 降壓ocoupling circuit 延遲電路odelayed circuit 電容transformer 供電系統(tǒng)opower station 線路損失oInsulation 絕緣ophase 發(fā)電站、發(fā)電廠oelectromotive force 電度角oelectrical angle 電動勢othreephase system 相、相位owiring loss 三相制opower source 變壓器opower supply system 電源 Translating Skills科技英語翻譯方法與技巧科技英語翻譯方

16、法與技巧詞性轉(zhuǎn)譯詞性轉(zhuǎn)譯一、英語動詞、形容詞、副詞譯成漢語名詞一、英語動詞、形容詞、副詞譯成漢語名詞o1. Telecommunications means so much in modern life that without it our modern life would be impossible.電信在現(xiàn)代生活中意義重大，沒有它就不可能有我們現(xiàn)在的電信在現(xiàn)代生活中意義重大，沒有它就不可能有我們現(xiàn)在的生活。生活。o2. Gases differ from solids in that the former has greater compressibility than the lat

17、ter.氣體和固體的區(qū)別在于氣體的可壓縮性比固體大。氣體和固體的區(qū)別在于氣體的可壓縮性比固體大。o3. The instrument is characterized by its compactness and portability.這個儀器的特點是結(jié)構(gòu)緊湊，攜帶方便。這個儀器的特點是結(jié)構(gòu)緊湊，攜帶方便。 o4. The cutting tools must be strong, tough, hard and wear resistant.刀具必須有足夠的強度、韌性、硬度、而且耐磨。o5. Dynamics is divided into statics and kinetics, th

18、e former treating of forces in equilibrium, the latter of the relation of force to motion.力學(xué)分為靜力學(xué)和動力學(xué)：前者研究平衡力，后者研究力和運動的關(guān)系。o6. The image must be dimensionally correct.圖形的尺寸必須正確。 二、英語名詞、介詞、形容詞、副詞譯成漢語動詞二、英語名詞、介詞、形容詞、副詞譯成漢語動詞o1. Substitution of manual finishing is one example of HSM application.代替手工精加工是

19、高速加工應(yīng)用的一個例子。代替手工精加工是高速加工應(yīng)用的一個例子。o2. Scientists are confident that all matter is indestructible.科學(xué)家們深信一切物質(zhì)是不滅的?？茖W(xué)家們深信一切物質(zhì)是不滅的。o3. The application of electronic computers makes for a tremendous rise in labor productivity.使用電子計算機可以大大提高勞動生產(chǎn)率。使用電子計算機可以大大提高勞動生產(chǎn)率。o4. In any machine input work equals output

20、 work plus work done against friction.任何機器的輸入功，都等于輸出功加上克服摩擦所做的功。任何機器的輸入功，都等于輸出功加上克服摩擦所做的功。o5. Open the valve to let air in .打開閥門，讓空氣進入。打開閥門，讓空氣進入。 三、英語的名詞、副詞和動詞譯成漢語形容詞三、英語的名詞、副詞和動詞譯成漢語形容詞o1. This wave guide tube is chiefly characterized by its simplicity of structure .這種波導(dǎo)管的主要特點是結(jié)構(gòu)簡單。這種波導(dǎo)管的主要特點是結(jié)構(gòu)簡單

21、。o2. The maiden voyage of the newly built steamship was a success.那艘新造輪船的處女航是成功的。那艘新造輪船的處女航是成功的。o3. It is a fact that no structural material is perfectly elastic.事實上沒有一種結(jié)構(gòu)材料是十全十美的彈性體。事實上沒有一種結(jié)構(gòu)材料是十全十美的彈性體。o4. They said that such knowledge is needed before they can develop a successful early warning s

22、ystem for earthquakes.他們說，這只是對他們要發(fā)明的一種有效的地震早期警報他們說，這只是對他們要發(fā)明的一種有效的地震早期警報是必要的。是必要的。 四、英語形容詞、名詞譯成漢語副詞四、英語形容詞、名詞譯成漢語副詞o 1.He had the honor to meat the U.S President.他榮幸地見到了美國總統(tǒng)。他榮幸地見到了美國總統(tǒng)。o 2.A continuous increase in the temperature of a gas confined in a container will lead to a continuous incerase i

23、n the internal pressure within the gas.不斷提高密封容器內(nèi)氣體的溫度，會使氣體的內(nèi)壓不斷提高密封容器內(nèi)氣體的溫度，會使氣體的內(nèi)壓力不斷增大。力不斷增大。 Reading MaterialSingle-phase RectifiersNew Words and Phrasesorectifier rektifai n.整流器odevice divais n.裝置，設(shè)備oconvert knv:t n.使轉(zhuǎn)變，轉(zhuǎn)換ophase feiz n.階段，狀態(tài)，相，相位ofilter filt n.濾波器，過濾器，濾光器，篩選osmooth smu: vt.使光滑，消

24、除opulsation plsenn.脈動，波動oterminal t:minl n.電極，接線端oforward f:wdad.向前，正前obiased bast a.加偏壓的oderive diraivvt.從得到owaveform weivf:mn.波形 o transformer trnsf:m(r)n.變壓器o secondary sekndri a.次級的o winding waindin.線圈o multiply mltipliv.乘o half-wave 半波o check valve 單向閥o full-wave全波o center-tapped 有中心抽頭的o with r

25、espect to 相對于 Unit 11TextResistor, Capacitor and Inductorp Resistors and Resistancep Capacitor and Capacitancep Inductors and InductanceNew Words and Phrasesocircuitry s:kitri n. 電路；回路；線路=circuitoresistor rizist n. 電阻器ocapacitor kpsit n.電容器 oinductor indkt n.感應(yīng)器oresistance rizistns n. 電阻，阻抗ocapacita

26、nce kpsitns n. 容量，電容oinductance indktns n. 電感，感應(yīng)oterminal t:minl n. 終端，接線端ovoltage vultid n. 電壓，伏特數(shù)olinear lini n. 線性的，線的oohm um n. 歐姆ocondenser kndens n. 電容器，冷凝器 odielectric ,daiilektrik n.電介質(zhì)，絕緣體 oceramic sirmik n. 陶器的 n. 陶瓷制品oelectromotive i,lektrumutiv a. 電動的，電測的ofrequency fri:kwnsi n. 頻率oreacta

27、nce riktns n. 電抗oproportionality pru,p:nliti n. 比例；相稱ospecify spesifai vt. 指定，詳細說明oequation ikwein n.等式，相等ofarad frd n. 法拉（電容單位）omold muld n. 模子，ocoil kil v. 盤繞，卷 n. 卷，線圈；繞組 o ampere mp n. 電 安培o be directly proportional to 與成正比o be termed 把稱為 ，把叫做o in the form of 用的形式Noteso1. Between its terminals i

28、t exhibits a voltage drop which is directly is proportional to the current passing through it.在它的二端間所呈現(xiàn)的電壓降和流過它的電流成正比。該句為復(fù)合句，關(guān)系代詞which引導(dǎo)定語從句，passing through it 是現(xiàn)在分詞短語作后置定語，修飾the current，意味：流過它的電流。o2. One ohm is defined as that amount of resistance that will limit the current in a conductor to one a

29、mpere when the voltage applied to the conductor is one volt.1歐姆的定義是：當(dāng)加到導(dǎo)體上的電壓為1伏特時，將導(dǎo)體的電流限制為1安培所需要的電阻值。句中that will limit the current 是定語從句；when the voltage applied to the conductor is one volt是狀語從句；applied to the conductor 為過去分詞短語作定語。 o3. The larger is the electromotive force, the more electricity t

30、he capacitor stores.電動勢越大，電容器存儲的電荷也越多。此句用了“The +形容詞的比較級，the +形容詞的比較級”的形式，是英語的一種常用的結(jié)構(gòu)，意思是“越越” ，又如：o4. The more impatient you are, the more mistakes you will make.你越性急，就越容易出錯。o5. Inductance differs from resistance in that resistance offers an opposition to all current.電感不同于電阻之處，在于電阻對任何電流都又阻力。In than =

31、 for the reason that 是連詞，引導(dǎo)一個狀語從句，意即：“基于.的理由” ，相當(dāng)于since；because 的作用。 Exercises. Answer the following questions according to the text.o 1. What form important elements in electronic circuitry?o 2. What is the size if the resistor?o 3. What is Ohms Law?o 4. What is a capacitor or a condenser?o 5. What

32、 is an inductor? And how is it formed? . Mark the following statements with T(true) or F(false) according to the text.o1. Resistors, capacitors form important elements in electronic circuitry.o2. Resistors may be classified as fixed or variable in their type and also as linear and nonlinear.o3. Elec

33、trical energy can be stored in an electric field. The device capable of doing this is called a resistor.o4. Capacitors are generally divided into classes according to their dielectric.o5. The ability of a capacitor to store electrical energy is termed capacitance.o6. An inductor is formed by winding

34、 wire around a suitable mold to form a coil. . Fill in the blanks with the proper form of the word given in the brackets.o 1. Resistors may be as fixed or variable in their type. (classify)o 2. The higher is the frequency the is the capacity reactance. (low)o 3. An inductor is formed by wire around

35、a suitable mold to form a coil. (wind)o 4. In an inductor, the voltage is to the time rate of change in the current. (proportion) . Translate the following sentences into Chinese.o1. It is essential to know something about resistance, capacitance and inductance.o2. A resistor is a two-terminal eleme

36、nt. Between its terminals it exhibits a voltage drop that is directly proportional to the current passing through it.o3. It is important to remember that capacitance is never constant, except under certain fixed conditions.o4. In an inductor, the voltage is directly proportional to the time rate of

37、change in the current. Translating Skills科技英語翻譯方法與技巧科技英語翻譯方法與技巧省略譯法省略譯法一、省略代詞一、省略代詞o1. By the word“alloy”we mean “mixture of metals”.用用“合金合金”這個詞來表示這個詞來表示“金屬的混合物金屬的混合物”。o2. The colume of the sun is about 1,300,000 times that of the earth. 太陽的體積約為地球的太陽的體積約為地球的130萬倍。萬倍。 二、省略冠詞二、省略冠詞o 1. Satellites can

38、be sent into space with the help of rockets. 借助火箭可以把衛(wèi)星送上太空。o 2. In the past, to fly to the moon was out of the question.在過去，飛往月球是絕對不可能做到的。定冠詞the 與某些形容詞連用，是形容詞名詞化，代一類人和物，the可不譯。如：the positive 正極; the ord 老年人，the rich 富人。 三、省略連詞三、省略連詞o 1.If there were no heat-treatment, metals could not be made so har

39、d.沒有熱處理，金屬就不會變得如此堅硬。o 2.Give him an inch and he will take a mile.他得寸進尺。 四、省略介詞四、省略介詞o 1.The search for ever better magnetic material is a part of the modern frontier of physics.研制更好的磁性材料是現(xiàn)代物理學(xué)的尖端之一。o 2. The unit of measurement of the pressure of water is Pa.水壓的計量單位是帕。o 3. Most substances expand in h

40、eating and contract in cooling.大多數(shù)物質(zhì)熱脹冷縮。 五、省略邏輯上或修辭上不需要的詞五、省略邏輯上或修辭上不需要的詞o 1. As we know, electrons revolve about the nucleus, or center, of an atom.正如我們所知，電子圍繞著原子核轉(zhuǎn)。o 2. A generator can not produce energy,what it does is to convert mechanical energy into electrical energy.發(fā)電機不能產(chǎn)生能量，它只能把機械能轉(zhuǎn)變?yōu)殡娔?。o

41、3. The applicants who had worked at a job would receive preference in getting the position over those who had not.有工作經(jīng)驗的人將優(yōu)先錄用。 Reading MaterialSensor Technologyp The sensor value chaino Wireless sensor technologyo Biometric sensorso Non-invasive & non-contact sensorso Miniaturization and integratio

42、no Novel materials o Sensor fusion and sensor networksNew Words and Phrasesodiversity daiv:siti n. 差異，多樣性oacquisition ,kwizin n. 獲得，獲得物otexture tekst n. 質(zhì)地，肌理，結(jié)構(gòu)omorphology m:fldi n. 生物 形態(tài)學(xué) 、形態(tài)論odynamics dainmiks n. 動力學(xué)ovibration vaibrein n. 振動，顫動，搖動，擺動oexploitation ,eksplitein n. 開發(fā)，開采otransceiver

43、trnssi:v n.無線電收發(fā)機，收發(fā)器oultrasound ltrsaund n.超頻率音響，超聲波oinherent inhirnt a.固有的，內(nèi)在的，與生俱來的ointegration ,intigrein n. 綜合，綜合化ooptics ptiks n. 光學(xué) oacoustics ku:stiks n. 聲學(xué)ofibre faib n. 纖維，構(gòu)造，纖維制品opolymer plim n. 聚合體omicroscope maikrskupn. 顯微鏡oatom tm n. 原子omolecule mlikju:l n. 化分子omultisensory ,mltisensri

44、 a. 多種感覺（并用）的ointerdisciplinary 各學(xué)科間的ohealth care 衛(wèi)生保健oconsumer product 消費品oself-powered 自供電的oRFID 射頻識別技術(shù) o energy tapping 能源開發(fā)o fingerprint identification 指紋識別o iris scanner 紅魔掃描儀o non-invasive 非插入式o non-contact 非接觸式o miniaturization 小型化o integration 集成化o novel material 新型材料o nanotechnology 納米 Unit

45、 12TextAmplifierNew Words and Phrasesoamplifier mplifai n. 放大器；擴音機omagnitude mgnitjud n. 大小，量oderive diraiv n. 起源oantenna nten n. 天線oinput input n. 輸入odenote dinut v. 表示，意味著ooutput autput n. 輸出oloudspeaker laudspik n. 揚聲器，擴音器o coil kil n. 線圈owinding wand n. 繞組，線圈orespectively rispektivli a. 個別的，各自的o

46、optimize ptmaz v. 使最佳化 owatt wt n. 瓦特oamplitude mplitjud n. 廣大，廣闊；調(diào)幅omicrovolt maikruvult n. 微伏omillivolt milivult n. 毫伏 oalgebra ldibr n. 代數(shù)學(xué) ographical grfikl a. 圖表的osine sain n. 正弦oillustrate ilstreit v. 說明，闡明；用圖說明oaudio diu a. 聽覺的，音頻的opulse pls n. 脈沖ogain gein n. 脈沖obandwidth bndwid n. 帶寬odistor

47、tion dist:n n. 失真oin terms of 根據(jù)，通過，用or-f (radio-freguency) 射頻 Noteso1.the amplifier is by far the most widely used building block in electronics systems.放大器在電子系統(tǒng)中是使用最廣泛的部件。By far 常用于比較級和最高級前，表示“非常，遠遠，最”，起加強語氣作用，又如：o 2.Voltage Eo is the output(load) voltage, and current Io the output (load) current.

48、電壓Eo是輸出（負載）電壓，電流Io是輸出（負載）電流。該句為并列句，在后一個分句current Io 之后省掉了動詞is。o 3.and for larger signals as a large-signal amplifier.而放大較大信號的放大器稱為大信號放大器。在as之前省去了主語和謂語 the amplifier may be classified, 因為它與前一個的主語和謂語相同，為了避免重復(fù)，所以省略了相同的部分。 o4. Simple algebra is all that is required for calculating the performance of sma

49、ll-signal amplifiers.計算小信號放大器性能只需要簡單的代數(shù)知識。句中 all 作表語，其后的 that 引導(dǎo)定語從句，修飾代詞 all 。all that = what , 又如：That is all that I want to obtain. = That is what I want to obtain.o 5. And for class B or AB operation the amplifier contains two transistors, referred to as pushpull amplifier.作乙類或甲類放大時，放大器有兩個晶體管，稱為

50、推挽放大器。Refer to 還有“提到、說道或涉及到某人/某事情；查詢、參考、送交”等，又如：The reader is referred to page 23. Exercises. Answer the following questions according to the text.o 1. What is an amplifier ?o 2. What is a voltage amplifier ?o 3. What is a power amplifier ?o 4. What is a large-signal amplifier ?o 5. What is a small-

51、signal amplifier ? . Mark the following statements with T(true) or F(false) according to the text.o1. If the amplifier is optimized to amplify voltage signals, it is called a power amplifier.o2. Another method of classification is based on the amplitude of signals.o3. Graphical method, are generally

52、 used in the analysis of small-signal amplifiers.o4. Simple algebra is all that is required for calculating the performance of large-signal amplifiers.o5. Amplifiers are also classified in terms of load current flow.o6. Amplifiers are also classified according to their intended operation. . Fill in

53、the blanks with the proper form of the word given in the brackets.o 1. The signal may be form a TV antenna. ( derive )o 2. For current signals, it is to as a current amplifier. ( refer )o 3. Another methood of is based on the amplitude of signals. ( classify )o 4. Graphical methods are used in the o

54、f large-signal amplifiers. ( analyze ) . Translate the following sentences into Chinese.o 1. An amplifier increases the magnitude of , or amplifies an electric signal.o 2. For current signals, it is referred to as a current amplifier.o 3. Amplifiers are also classified in terms of load current flow.

55、o 4. Amplifiers are also classified according to their intended operation. Translating Skills科技英語翻譯方法與技巧科技英語翻譯方法與技巧詞義的選擇詞義的選擇一、根據(jù)詞類選擇詞義一、根據(jù)詞類選擇詞義o1. I like English more than mathematics.我喜歡英語勝過喜歡數(shù)學(xué)。（我喜歡英語勝過喜歡數(shù)學(xué)。（like為動詞）為動詞）o2. He looks like an athlete.他看起來像一位運動員。（他看起來像一位運動員。（like為介詞）為介詞）o3. Like ch

56、arges repel; unlike charges attract.相同的電荷排斥；不同的電荷相吸引。（相同的電荷排斥；不同的電荷相吸引。（like為形容詞）為形容詞）o4. Like attracts/draws to like.物以類聚。（物以類聚。（like為名詞）為名詞）o5. I hope Ican use a computer like you do.我希望我使用計算機像你一樣。我希望我使用計算機像你一樣。(like是連接詞，作是連接詞，作“如同如同”講講) 二、同一詞類表達不同詞義二、同一詞類表達不同詞義o1. The volume varies as the tmperat

57、ure increass.體積隨著溫度增加而變化。（體積隨著溫度增加而變化。（as引導(dǎo)時間狀語從句）引導(dǎo)時間狀語從句）o2. As heat makes things move, it is a form of energy.因為熱能使物體運動，所以熱是能的一種形式。（因為熱能使物體運動，所以熱是能的一種形式。（as引導(dǎo)原因引導(dǎo)原因狀語從句）狀語從句）o3. Small as atoms are, electrons are still smaller.原子雖然小，但電子更小。（原子雖然小，但電子更小。（as引導(dǎo)讓步狀語從句）引導(dǎo)讓步狀語從句）o4. She seemed very relax

58、edin her very natural setting as it were.她似乎十分悠然自得她似乎十分悠然自得可以說是有自可以說是有自己隨遇而安的田地。（己隨遇而安的田地。（as構(gòu)成習(xí)語，表示可以說）構(gòu)成習(xí)語，表示可以說） 三、根據(jù)單詞搭配情況確定詞義三、根據(jù)單詞搭配情況確定詞義o1. The fifth power of two thirtytwo.二的五次方是三十二。（數(shù)學(xué)）二的五次方是三十二。（數(shù)學(xué)）o 2. The surface of ceramics must be checked by examining them under a 20 power binocular m

59、icroscope.陶瓷器表面必須用陶瓷器表面必須用20倍的雙筒顯微鏡加以檢驗。（數(shù)學(xué)）倍的雙筒顯微鏡加以檢驗。（數(shù)學(xué)）o3. With the development of electrcal engineering, power can be transmitted over long distances.隨著電氣工程的發(fā)展，電力能輸送得非常遠。（電學(xué)）隨著電氣工程的發(fā)展，電力能輸送得非常遠。（電學(xué)）o4. Friction can cause a loss of power in every maching.摩擦能引起每一臺機器功率的損耗。（物理學(xué)）摩擦能引起每一臺機器功率的損耗。（物理

60、學(xué)） 四、根據(jù)名詞的單復(fù)數(shù)選擇詞義。四、根據(jù)名詞的單復(fù)數(shù)選擇詞義。o 名詞名詞 單數(shù)詞義單數(shù)詞義 復(fù)數(shù)詞義復(fù)數(shù)詞義o facility 簡單，靈巧簡單，靈巧 設(shè)施，工具設(shè)施，工具o charge 負荷，電荷負荷，電荷 費用費用o main 主線，干線主線，干線 電源電源o work 功，工作功，工作 著作，工程著作，工程o spirit 精神精神 酒精酒精o1. Although they lost, the team played with tremendous spirit.那隊輸是輸了，但卻表現(xiàn)了極其頑強的精神。那隊輸是輸了，但卻表現(xiàn)了極其頑強的精神。o 2. Whisky, brand