科技英语翻译教程

CHAPTER T HREE1.The inflammation is characterized by red,swelling,fever,and pain.[E.44]2.A material balance is based on the law of conservation of matter.[E.45]3.Coating thickness ranges from0.1mm to2mm.[E.46]4.The new medicine will expire in2years.[E.47]5.Gases differ from solids in that the former have greater compressibility than thelatter.[E.48]6.The molecules continue to stay close together,but do not continue to retain a regularfixed arrangement.[E.49]7.These products tend to react with soap and detergents and produce soapscum.[E.50]8.With this software so available there seems little need for analysts to develop theirown programs.[E.51]9.To design is to formulate a plan for the satisfaction of a human need.[E.52]10.China's successful explosion of its first atom bomb caused tremendous repercussionthroughout the world.[E.53]11.The construction of a scientific theory may be compared to the preparation of aweather map at a central meteorological station.[E.54]12.In a similar way,in the theory of light,we use terms like"waves"and"particles"for the description and discussion of the results of experiments.[E.55]13.One of our ways for getting heat is by burning fuels.[E.56]14.An understanding of the laws of friction is important in the designing of modernmachines.[E.57]15.Heating water does not change its chemical composition.[E.58]16.This experiment is an absolute necessity in determining the best processingroute.[E.60]17.I am a stranger to the operation of electronic computer.[E.61]18.His experiment was a success.[E.62]19.I found a lot of difficulties to continue the experiment.[E.63]20.Whenever one body touches another,heat always passes by conduction from thewarmer to the colder.[E.68]21.This workpiece is not more elastic than that one.[E.69]22.In fission processes the fission fragments are very radioactive.[E.70]23.Glass is much more soluble than quartz.[E.71]24.This metal is less hard than that one.[E.72]25.The wide application of electronic computers affects tremendously the developmentof science and technology.[E.81]26.Earthquakes are closely related to faulting.[E.82]27.The electronic computer is chiefly characterized by accuracy and quickcomputation.[E.83]28.Gasoline is appreciably volatile.[E.84]29.It is demonstrated that dust is extremely hazardous.[E.85]30.The power plant supplies the inhabitants sixty li about with electricity.[E.86]31.The buildings around are mostly of modem construction.[E.87]32.The attractive force between the molecules is negligibly small.[E.88]33.All structural materials behave plastically above their elastic range.[E.89]34.These parts must be proportionally correct.[E.90]35.Chlorine is very active chemically.[E.91]36.Open the valve to let air in.[E.92]37.Their experiment has been over.[E.93]38.In this case the temperature in the furnace is up.[E.94]39.The frequency,wave length,and speed of sound are closely related.[E.106]40.The advantages of the recently developed composite materials are energy saving,performance efficient,corrosion resistant,long service time,and without environmental pollution.[E.107]41.Radiant,electrical and chemical energies can all be turned into heat.[E.108]42.The temperature needed for this processing is lower than that needed to melt themetal.[E.109]43.Oxidation will make metals rusty.[E.110]44.In rapid oxidation a flame is produced.[E.111]45.These principles will be illustrated by the following transition.[E.112]46.The best conductor has the least resistance and the poorest has the greatest.[E.113]47.Forces can be classified as internal and external.[E.114]48.Economic globalization has widened the gap between the North and the South andbetween the rich and the poor.[E.115]49.Matter can be changed into energy,and energy into matter.[E.116]50.The generation plant,transmission lines,and primary substations are shown abovethe dashed line;the load and distribution below the line.[E.117]51.Science demands men of great effort and complete devotion.[E.118]52.The new products will soon be put into use.[E.119]53.There are three larger injection machines in the workshop.[E.120]54.Note that the words“velocity"and"speed"require explanation.[E.121]55.A data processor can issue address and function codes.[E.122]56.Air is a mixture of gases.[E.123]57.For reasons the alternating current is more widely used than the direct current.[E.124]58.These early cars were slow,clumsy,and inefficient.[E.130]59.Science and technology are developing rapidly.[E.131]60.A new kind of computer----small,cheap,fine----is attracting increasingattention.[E.132]61.Inflation has now reached a serious level.[E.133]62.It must have been surprising to see a little girl working at a high table,surroundedby maps and ala kinds of instruments.[E.134]63.Heat from the sun stirs up the atmosphere,generating winds.[E.135]64.In general,all the metals are good conductors,with silver the best and copper thesecond.[E.136]65.In addition to the speed of erection,these types usually have otheradvantages.[E.137]66.The level of a liquid rises as its temperature is increased and falls with a decrease intemperature.[E.198]67.The properties of alloys are much better than those of pure metals.[E.199]68.We must check the conclusion in practice,and should not blindly rely on such as wasreached merely by calculations.[E.200]69.Natural water is that which contains impurities.[E.201]70.Other substances,apart from organic ones,burn in air or oxygen.[E.202]71.An electric light bulb is a vacuum,and so is a radio tube.[E.203]72.A transversely stressed fillet weld can sustain higher loads than one stressedlongitudinally.[E.204]73.It takes more power to do a job in two minutes than it does to do the same job in twohours.[E.205]74.We tried in vain to measure the voltage.[E.224]75.Hardened steel is too hard and too brittle for many tools.[E.225]76.Ideal machines which would have an efficiency of100%should be free offriction.[E.226]77.The need for more potassium compounds than could be obtained from plants ledmen to search for other source of these important compounds.[E.227]78.In the absence of force,a body will either remain at rest or continue to move withconstant speed in a straight line.[E.228]79.The structure will prove weak in service.[E.229]80.The precision instrument must be kept free from dust.[E.230]81.The Theory of Relativity worked out by Einstein is above many people'scomprehension.[E.231]82.Better to do well than to say well.[E.233]83.The common gem materials tend to be less ductile and weaker.[E.234]84.As rubber electricity from passing through it,it is used as insulating material.[E.235]85.There are.many other energy sources in store.[E.236]86.In the high altitude snow and ice remain all year.[E.237]87.It was suggested that such devices should be designed and produced withoutdelay.[E.238]88.Sodium is never found uncombined in nature.[E.239]89.In this case we cannot but determine K first.[E.240]90.It's not eas to talk about Dolly in a world that doesn't share a uniform set of ethicalValues.[E.241]91.Such flight couldn't long escape notice.[E.242]92.Crystals do not melt until heated to a definite temperature.[E.243]ser is the most powerful drilling machine,because there is nothing on earthwhich cannot be drilled by it.[E.244]94.Both of the instruments are not precision ones.[E.270]95.Both of the substances are not made up of carbons.[E.271]96.We are not familiar with both of the instruments.[E.272]97.Positive ions are not all alike and may differ in charge or weight.[E.273]98.An engine may not all ways do work at its rated horse-power.[E.274]99.Not everyone can be a mathematician,but in order to understand our modern world,it is necessary to know something about mathematics.[E.275]100.Digital oscilloscopes can not be often used in our experiments.[E.276]101.All metals do not conduct electricity equally well.[E.277]102.All these various losses,great as they are,do not in any way contradict the law of conservation of energy.[E.278]103.All the chemical energy of the fuel is not converted into heat.[E.279]104.All isotopes cannot be manufactured in this way.[E.280]105.Mercury,so small and close to the sun that its gases were quickly lost to space,is nearly airless.[E.282]106.The speed of the man-made satellite hardly changes at all.[E.283]107.Rarely do metals occur in nature in a pure form by themselves.[E.284]108.The US has well-developed and successful offensive command and control warfare(C2W),electronic warfare(EW),and other information(1W)capacities,but these can hardly be characterized as"strategic".[E.285]109.Barely any of our present batteries would be satisfactory enough to drive the electric train fast and at a reasonable cost.[E.286]110.Scarcely ever does the common oyster contain a valuable pearl.[E.287]111.Workers can violate the safety rules on no conditions.[E.316]112.We shall consent to the designing plan under no circumstances.[E.317]113.He was not ready to believe something just because Aristotle said so.[E.318]114.The engine did not stop because the fuel was finished.[E.319]115.This electric motor does not work properly.[E.320]116.If iron is kept in air-free distilled water,its rusting is not so fast.[E.321]CHAPTER F IVE117.Being no cause to change the motion,a body can move uniformly and in a straight line.[E.10]ing a transformer,power at low voltage can be transformed into power at high voltage.[E.11]119.Solving(8),we have the following equation.[E.12]120.When iodine crystals are heated to114°C,they melt,forming liquid iodine.[E.16]121.The propeller of an airplane forces air backward,developing thrust.[E.17]122.The base and acid neutralize each other,forming a new substance.[E.18]123.Electronic computer having many advantages cannot carry out creative work and replace man.[E.19]124.Not having been discovered,many laws of nature actually exist in nature.[E.20]125.The typical problem of circuit and network theory is to determine the currents caused by the application of a given voltage to given circuit or network.[E.33]126.The principle and method taken in the experiment give us good message enlightenment.[E.34]127.The major advantages of the transistor as used in electronic circuits are light weight small space,low power consumption.[E.35]128.Radio continues to find wider application in science.[E.65]129.An electric current begins to flow through a coil,which is connected across a charged condenser.[E.66]130.A machine is just a mechanical device which makes it possible to do work more conveniently by changing the applied force in directions or in magnitude or both.[E.67]131.The basic action of an SCR is to switch power on very rapidly.[E.68]132.The function of a fuse is to protect a circuit.[E.69]133.Arc welding is to make metals together by means of an electric current.[E.70]134.The two contacts at the base of the lamp are to cant'current from the lamp holder.[E.71]135.Loss of control is most likely to occur on inductive loads.[E.86]136.These are liable to occur through hammering or working the metal,or through rapid cooling.[E.87]137.Up to now,copper alloys,according to CDA,have been more expensive to pressure die cast than aluminum and zinc,and a25%reduction in the cost of pressure die casting of copper alloys is expected with the new technique.[E.88]138.Circuit breakers are necessary to deenergize equipment either for normal operation or on the occurrence of short circuits.[E.89]139.We consider heat to be a form of energy.[E.90]140.Conductors allow electricity to pass through more or less freely.[E.91]141.It is to be emphasized that a source of electricity current is simply a device for causing electricity to move around a circuit.[E.92]142.Electricity makes a motor run.[E.93]143.Let F represent force.[E.94]144.Heat is considered to be a form of energy.[E.95]145.The thermal decomposition of ammonium carbamate can be made to occur by the following methods.[E.96]146.Insulators are used to confine a current to the desired path.[E.97]147.The fact that some bodies float on water and other liquids shows also that there exists a force acting against the lower surfaces sufficient to counteract their weight.[E.113]148.Some of the of the charge produces the sound and light which enable us to hear and see the spark.[E.116]149.The purpose is to transmit only a chrominance signal for color and a luminance signal that contains the monochrome information.[E.117]150.The physical dimension of the antenna determines the amount of inductance and capacity existing in the circuit and consequently the resonant frequency of the antenna system.[E.118]151.However,both the theory and the generation of FM are a good deal more complex to think about and visualize than those of AM.[E.119]152.The development greatly extends the range of applications and the reliability of the jet-type filter while retaining its other advantages.[E.120]CHAPTER S IX153.Day light comes from the sun,which is a mass of hot,glowing gas.[E.129]154.The concept of energy leads to the principle of the conservation of energy,which unifies a wide range of phenomena in the physical science.[E.130]155.Another kind of rectifier consists of a large pear-shaped glass bulb from which all the air has been removed.[E.131]156.If you deal with the younger age group,then you will see a lot of the acute infections such as herpes and trench mouth,which is due to bacteria and causes open sores between the teeth.[E.132]157.These waves,which are commonly called radio waves,travel with the velocity of Light.[E.133]158.ISDN is the name given to a network that is able to transmit and switch a wide variety of telecommunication services.[E.134]159.Sulfur melts at a temperature of112.8°C,where it changes to yellow liquid.[E.135]160.The last big Alaskan earthquake created a tsunami,which could be felt1,500miles away.[E.136]161.The electricity is changed into the radio-frequency power which is then sent out in form of radio waves.[E.137]162.There are some materials which possess the power to conduct heat.[E.138]163.In a conductor there are a large number of electrons than move freely from atom to atom.[E.139]164.OSHA has qualified the noise level in industry which has become a major concern for many digital controls manufacturers.[E.140]165.The factory produced machine tools to which precision instruments were attached.[E.141]166.Good clocks have pendulums,which are automatically compensated for temperature changes.[E.142]167.Gases,the molecules of which are widely separated from one another,have great compressibility than liquids.[E.143]168.An improved design of such a large tower must be achieved which results in more uniformed temperature distribution in it.[E.155]169.A body that contains only atoms with the same general properties is called an element.[E.156]170.Such liquid fuel rockets as are now being used for space research have to carry their own supply of oxygen.[E.157]171.Such propellers as we have recently designed for small ships are actually modeled on fish tails.[E.158]172.Many inventors followed the same principles as that French inventor had used in his Invention.[E.159]173.A color transmission contains the same information as a black and white transmission.[E.160]174.Were there no transformers to adjust the voltage,long-distance transmission of electricity would be impossible.[E.184]175.Should there be urgent situations,press this red button to switch off the electricity.[E.185]176.The temperature at the sun's center is as high as10,000,0000C.[E.186]177.The outer portion of the wheel may travel as fast as600miles per hour.[E.187] 178.The oxygen atom is nearly16times heavier than the hydrogen atom.[E.188]179.Mercury weighs more than water by about14times.[E.189]180.Solar cells are as different from so called solar heating panels as solid state physics is from plumbing.[E.190]181.In such occasions we would rather increase the friction of the surface than decease it.[E.191]182.The loads which a structure is subjected to are divided into dead loads,whichinclude the weights of parts of the structure,and live loads.Which are due to the weights of people,movable equipment,etc.[E.245]183.The resistance of any length of a conducting wire is easily measured by finding the potential difference in volts between its ends when a known current is following.[E.246]184.Fuel cells are devices that when a fuel such as hydrogen or hydrogen-rich compounds and oxygen is supplied to materials arranged like the anode and cathode of a conventional battery,combine to convert chemical energy directly into electrical energy.[E.247]185.With the same number of protons,all nuclei of a given element may have different numbers of neutrons.[E.248]186.The unit of electrical energy is called the joule,which is equivalent to10exp(7) ergs.[E.249]187.The discovery that electrical currents can be produced by magnetism is extremely important in the field of electricity.[E.250]188.Grounding every circuit,however,makes the system susceptible to excessive currents should a short circuit develop between a live conductor and ground.[E.251]189.It is very interesting to note the differently chosen operating mechanism by the different manufacturers,in spite of fact that the operating mechanism has a major influence on the reliability of the circuit-breakers.[E.252]190.The construction of such a satellite is now believed to be quite realizable,its realization being supported with all the achievements of contemporary science,which have brought into being not only materials capable of withstanding severe stresses involved and high temperatures developed,but new technological processes as well.[E.253]191.Various machine parts can be washed very clean and will be as clean as new ones when they are treated by ultrasonic waves no matter how dirty and irregularlyshaped they may be.[E.254]CHAPTER S EVEN192.Theγ-rays are not affected by an electric field.[E.4]193.If the work piece is gabbed directly,it warps due to the body temperature.[E.5]194.If a body is acted on by a number of forces and still remains stationary,the body is said to be in equilibrium.[E.6]195.An oxidation number may be assigned to each atom in a substance by the application of simple rules.[E.7]196.The second group is composed of compounds derived from or related to benzene C6H6.[E.8]197.The crops were washed away by the flood.[E.9]198.The airplane is supported by the wings;it is propelled by the power plant;it is guided by its control surfaces.[E.10]199.This extraction rate was confirmed in batch tank tests.[E.11]200.Other advantages of our invention will be discussed in the following.[E.12]201.These problems must be solved before the test starts.[E.13]202.North China was hit by an unexpected heavy rain,which caused severe flooding.[E.14]203.The hypothesis was not accepted by most chemists until the1970s.[E.15]204.The first car driven by one of these engines was seen on the roads in1894.[E.16]。