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2024年4月16日发(作者:java中组件的属性及方法)

26 The Magic of Energy 能的魔力

1. We talk about energy all the time-"Zilch, the energy

food," "energy crisis," and so on. If asked to define it, however, we'd probably respond

with something like "Well, it's-uh-well, you know-electricity."

1、我们时时刻刻讨论着能:“能量食物”,“能源危机”,等等。如果让我们给能下个定义,答案很可

能是一些模棱两可的话:“哦,能是,嗯,你知道,像电。”

2. True;electricity is one kind of energy. However, energy comes in many forms. You cannot see

or smell or taste energy, but it's always there, and one of the most fascinating<迷人的,有极大吸引

力的> things about it is its ability to change from one form to another-like magic. This principle

of change is what keeps everything-and everyone-going in this world of ours.

2、确实,电是能量中的一种。但是,能可以来自多种形式。你看不见、闻不到、也品尝不了能,但是,

它始终存在着,关于能,最吸引人的就是,它具有从一种形式转换成另外一种形式的能力,简直如同魔术。

这些转化的原理是维持着我们这个世界每一样事物、每一个人的运动。

Heat Energy 热能

3. When a fuel<燃料> unites with<结合,联合> oxygen, we say the fuel burns; what is really

happening is that chemical energy (fuel and oxygen) is changing to heat energy. When the fuel

(food) we eat unites with the oxygen we breathe, we then have heat energy to run our bodies.

3、当燃料与氧气结合时,我们就说燃料开始燃烧了,实际发生的是化学能(燃料与氧气)转化成热能。

当燃料(我们吃的食物)与我们呼吸的氧气结合,我们获得我们身体运动所需的热能。

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4. When you pop<取出> a frozen waffle<饼> into the toaster<烤面包机>, electrical energy

turns into<变成> heat energy.

4、当你取出一块冷冻饼放进烤面包机时,电能转化成了热能。

5. In the internal<内部的>-combustion engine<引擎,发动机> of a car, an electric

spark<电火花> explodes gasses in the cylinder<气缸>; then heat energy moves the

pistons<活塞>, becoming mechanical energy to move the car.

5、在汽车的内燃机引擎里,电火花引爆气缸里的燃料气体,然后热能推动活塞,成为机械能推动汽车行

驶。

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<涡轮>,

the steam pushes against blades<叶片>. 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<无限

制地>. If, for instance<比如,例如>, the steam engine or turbine is connected to a generator<发电

机>, the mechanical energy can become electrical energy, which can become heat energy (for the

electric stove<炉>), mechanical energy (for the washer<洗衣机>), etc.

7、能量从一种形式转化为另一种形式的变化几乎能够无限制地进行下去。比如说,如果蒸汽机或者蒸汽

轮机和一个发电机连接起来,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。

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本文标签: 推动 热能 形式