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2011职称英语考试考前辅导_精选阅读中英文语句(35)

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The Magic of Energy(能的魔力)

6. In a steam engine, the chemical energy of fuel is changed to heat energy; the heated water, now steam, forces the pistons to move. In a steam turbine, the steam pushes against blades. In both cases, mechanical energy results.

6、在蒸汽机里,燃料里的化学能转化成热能,加热水,成为水蒸汽,推动活塞运动。在燃气轮机里,水蒸汽推动的是叶片。在这两种情况中,都是机械能起的作用。

7. This changing from one form of energy to another can continue almost indefinitely. If, for instance, the steam engine or turbine is connected to a generator, the mechanical energy can become electrical energy, which can become heat energy(for the electric stove), mechanical energy(for the washer), etc.

7、能量从一种形式转化为另一种形式的变化几乎能够平稳连续进行。比如说,如果蒸汽机或者蒸汽轮机和一个发电机联接起来,那么机械能就可以转化成电能,然后转化成热能(比如电炉)、机械能(如洗衣机)等等。

8. Thus, energy readily changes back and forth from one form to another. What starts out as one form of energy may be a totally different form when it reaches its final use.

8、因此,能量可以轻易地从一种形式到另一种形式来回转换。从最初的能量形式到最后的使用形式,能的形态可能已经完全改变了。

Radiant Energy

辐射能

9. Radiant energy is also called light energy. Our most important source of radiant energy is, of course, the sun. Without it there would be no life, for plant life depends upon radiant energy-and we depend upon plant life.

9、辐射能也称作光能。当然,我们人类最重要的光能的来源就是太阳。没有太阳,就没有生命,植物的生命依赖辐射能,而我们依赖植物的生命。

10. Other forms of radiant energy familiar to us are radio waves, infrared rays, ultra-violet rays, X rays, and gamma rays.

10、我们熟悉的另外一些形式的辐射能是电磁波,红外线、紫外线、X射线和伽玛射线。
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