[考研类试卷]考研英语(翻译)模拟试卷36及答案与解析.doc
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1、考研英语(翻译)模拟试卷 36 及答案与解析Part CDirections: Read the following text carefully and then translate the underlined segments into Chinese. (10 points) 0 At the moment, there are two reliable ways to make electricity from sunlight.【F1】You can use a panel of solar cells to create the current directly, by libe
2、rating electrons from a semiconducting material such as silicon. Or you can concentrate the suns rays using mirrors, boil water with them, and employ the steam to drive a generator.Both work. But both are expensive. Gang Chen of the Massachusetts Institute of Technology and Zhifeng Ren of Boston Col
3、lege therefore propose, in a paper in Nature Materials, an alternative. They suggest that a phenomenon called the thermoelectric effect might be used insteadand they have built a prototype to show that the idea is practical.In their view, three things are needed to create a workable solar-thermoelec
4、tric device. The first is to make sure that most of the sunlight which falls on it is absorbed, rather than being reflected. The second is to choose a thermoelectric material which conducts heat badly(so that different parts remain at different temperatures)but electricity well.【F2】The third is to b
5、e certain that the temperature gradient which that badly conducting material creates is not frittered away by poor design.The two researchers overcame these challenges through clever engineering. The first they dealt with by coating the top of the device with oxides of hafnium, molybdenum and titani
6、um, in layers about 100 nanometres thick.【F3】These layers acted like the anti-reflective coatings on spectacle lenses and caused almost all the sunlight falling on the device to be absorbed.The second desideratum, of low thermal and high electrical conductivity, was achieved by dividing the bismuth
7、telluride into pellets a few nanometres across.【F4 】That does not affect their electrical conductivity, but nanoscale particles like this are known to scatter and obstruct the passage of heat through imperfectly understood quantum-mechanical processes.The third objective, efficient design, involved
8、sandwiching the nanostructured bismuth telluride between two copper plates and then enclosing the upper plate(the one coated with the light-absorbing oxides)and the bismuth telluride in a vacuum. The copper plates conducted heat rapidly to and from the bismuth telluride, thus maintaining the tempera
9、ture difference. The vacuum stopped the apparatus losing heat by convection. The upshot was a device that converts 4.6% of incident sunlight into electricity.【F5 】That is not great compared with the 20% and more achieved by a silicon-based solar cell, the 40% managed by a solar-thermal turbine, or e
10、ven the 18-20% of one of the new generation of cheap and cheerful thin-film solar cells. But it is enough, Dr Chen reckons, for the process to be worth considering for mass production.1 【F1】2 【F2】3 【F3】4 【F4】5 【F5】5 【F1】Many objects in daily use have clearly been influenced by science, but their for
11、m and function, their dimensions and appearance, were determined by technologists, artisans, designers, inventors, and engineersusing nonscientific modes of thought. Many features and qualities of the objects that a technologist thinks about cannot be reduced to unambiguous verbal descriptions; they
12、 are dealt with in the mind by a visual, nonverbal process. In the development of Western technology, it has been nonverbal thinking, by and large, that has fixed the outlines and filled in the details of our material surroundings.【F2】Pyramids, cathedrals, and rockets exist not because of geometry o
13、r thermodynamics, but because they were first a picture in the minds of those who built them.The creative shaping process of a technologist s mind can be seen in nearly every artifact that exists.【F3】For example, in designing a diesel engine, a technologist might impress individual ways of nonverbal
14、 thinking on the machine by continually using an intuitive sense of rightness and fitness. What would be the shape of the combustion chamber? Where should be valves be placed? Should it have a long or short piston? Such questions have a range of answers that are supplied by experience, by physical r
15、equirements, by limitations of available space, and not least by a sense of form. Some decisions such as wall thickness and pin diameter, may depend on scientific calculations, but the nonscientific component of design remains primary.Design courses, then, should be an essential element in engineeri
16、ng curricula. Nonverbal thinking, a central mechanism in engineering design, involves perceptions, the stock-in-trade of the artist, not the scientist.【F4 】Because perceptive processes are not assumed to entail hard thinking, nonverbal thought is sometimes seen as a primitive stage in the developmen
17、t of cognitive processes and inferior to verbal or mathematical thought. But it is paradoxical that when the staff of the Historic American Engineering Record wished to have drawings made of machines and isometric views of industrial processes for its historical record of American engineering, the o
18、nly college students with the requisite abilities were not engineering students, but rather students attending architectural schools.【F5】If courses in design, which in a strongly analytical engineering curriculum provide the background required for practical problem-solving are not provided, we can
19、expect to encounter silly but costly errors occurring in advanced engineering systems. For example, early models of high-speed railroad cars loaded with sophisticated controls were unable to operate in a snowstorm because a fan sucked snow into the electrical system. Absurd random failures that plag
20、ue automatic control systems are not merely trivial aberrations; they are a reflection of the chaos that results when design is assumed to be primarily a problem in mathematics.6 【F1】7 【F2】8 【F3】9 【F4】10 【F5】10 Timothy Berners-Lee might be giving Bill Gates a run for the money, but he passed up his
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