33.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、大家无时无刻讨论着能：能量食物，能源危机，等等。假如要大家去给能下个概念，答案非常可能是一些模棱两可的话：哦，能量是，嗯，你了解，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 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，能量可以来自多种形式。你看不见、闻不到、也品尝不了能，但，它一直存在着，关于能量，最吸引人的就是，它具备从一种形式转换成另外一种形式的能力，简直好似魔术。这类转化的原理是保持大家这个世界每一样事物、每个人的运动。
Heat Energy
热能
3.When a fuel unites with oxygen,we say the fuel burns; what is really happening is that chemical energy is changing to heat energy.When the fuel 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，大家就说燃料开始燃烧了，实质发生的是化学能（燃料与氧气）转化成热能。当燃料（大家吃的食物）与大家呼吸的氧气结合，大家获得大家身体运动所需的热能。
4.When you pop a frozen waffle into the toaster,electrical energy turns into heat energy.
4、当你取出一块冷冻饼放进烤面包器时，电能转化成了热能。
5.In the internal-combustion1 engine of a car,an electric spark explodes gasses in the cylinder;the heat energy moves the pistons2,becoming mechanical energy to move the car.
5、在汽车的内燃机引擎里，电火花引燃气缸里的燃料气体，然后热能推进活塞，成为机械能推进汽车行驶。
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,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，推进活塞运动。在燃气轮机里，水蒸汽推进的是叶片。在这两种状况中，都是机械能起有哪些用途。
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,mechanical energy,etc.
7、能量从一种形式转化为另一种形式的变化几乎可以平稳连续进行。譬如说，假如蒸汽机或者蒸汽轮机和一个发电机联接起来，那样机械能就能转化成电能，然后转化成热能（譬如电炉）、机械能（如洗衣机）等等。
8.Thus,energy readily changes back and forth3 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，能量可以随便地从一种形式到另一种形式来回转换。从刚开始的能量形式到最后的用法形式，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，大家人类非常重要的光能的来源就是太阳。没太阳，就没生命，植物的生命依靠辐射能，而大家依靠植物的生命。
10.Other forms of radiant energy familiar to us are radio waves,infrared rays,ultra-violet rays,X rays,and gamma rays.
10、大家熟知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。
Mechanical Energy
机械能
11.In simplest terms,this is the energy of a moving object.Your heartbeat,the pushing of a lawn mower,a baseball speeding through the air,water falling onto a waterwheel,the prying4 up of a rock with a crowbar-all are mechanical energy,which,of course,was another form of energy earlier.
11、用最简单的术语来描述，机械能就是移动着的物体拥有些能量。你的心脏跳动、推进割草机、棒球在空中高速飞过、水落入水轮机、用撬杠撬开石头等等，所有这类都是机械能，当然，在转化之前它是另一种能量形式。
Electrical Energy
电能
12.Electrical energy usually has to be changed to another form before it actually does what we want it to do.In the toaster,it changes to heat;in a tiny wrist watch or a subway train or a 75,000 horse-power industrial motor,it changes to mechanical energy.In an industrial process called electrolysis,it changes to chemical energy.
12、一般情况下，电能需要先转化为另一种形式的能，才能为大家所用。对烤面包机来讲，电能转化成热能，在一个小小的手表里或者地铁列车里或者一台75000马力的工业电动机里，电能转化成机械能。在所谓的电解工业的过程中，它转化成化学能。
Chemical Energy
化学能
13.Various fuels such as coal,gas,oil and food are common examples of chemical energy.These fuels give off heat when they burn.The process is called combustion or oxidation,and the heat itself is a form of energy.Man uses the energy from some kind of fuel for everything from flying to the moon to thinking about it.
13、最容易见到的化学能包含煤、天然气、石油、和食物等各种各样的燃料。当这类燃料燃烧时释放出热能。这个过程大家称之为燃烧或者氧化反应，同时热本身也是能量的一种形式。大家从不同燃料中得到的能量，并用这类能量做什么事情，大到飞上月球，小到头脑的考虑。
14.A special kind of chemical energy is nuclear energy,sometimes called atomic energy.These names come from the fact that the source of energy the nucleus,or core,of the atom,Nuclear fuels much as plutonium and uranium give off heat energy when fission occurs.Already we have seen tremendous advances in the use of nuclear energy for peaceful purposes,and many people see nuclear energy as the future answer to almost all of our energy need.
14、核能是一种特殊的化学能，有时大家称之为原子能。这个名字源于原子能源自核、或者原子核如此的事实。当核燃料，比如钋和铀，发生核分裂转变时释放出热能（这类燃料中原子发生分裂）。大家已经看到和平借助核能所带来的巨大好处，并且不少人觉得核能可以看作解决将来人类能源需要问题的答案。
15.Energy-the kind of magic we can't live without.
15、能，是与人类存活息息有关的一种魔力。
相关文章推荐
