評論
打印
1. We talk about energyall the time-"Zilch, the energy food," "energy crisis,"and so on. Ifaskedto define it, however, we'd probably respond withsomething like"Well, it's-uh-well, youknow-electricity."
1、我們時時刻刻（all the time）討論著能：“能量食物”，“能源危機”，等等。如果要我們去給能下個定義，答案很可能是一些模棱兩可的話：“哦，能量是，嗯，你知道，電。”
2. True; electricity is one kind of energy. However,energy comesinmany forms. You cannot see or smell or taste energy, butit's always there, andone of themost fascinating things aboutit is its abilityto change from one form to another-likemagic. This principle of change iswhatkeeps everything-and everyone-going in this world of ours.
2、確實，電是能量中的一種。但是，能量可以來自多種形式(energy comes in many forms)。你看不見、聞不到、也品嘗不了能，但是，它始終存在著，關于能量，最吸引人的就是，它具有從一種形式轉換成另外一種形式的能力，簡直如同魔術(like magic)。這些轉化的原理是維持我們這個世界每一樣事物、每一個人的運動(keepgoing)。
HeatEnergy 熱能
3. When a fuel uniteswith oxygen, we say the fuel burns;whatis reallyhappeningisthatchemical energy (fuel andoxygen) is changing to heat energy. When the fuel (food)we eatunites with the oxygenwe breathe, we then have heatenergytorun our bodies.
3、當燃料與氧氣結合時，我們就說燃料開始燃燒了，實際發生的是化學能（燃料與氧氣）轉化成熱能。當燃料（我們吃的食物）與我們呼吸的氧氣結合，我們獲得我們身體運動所需的(to run our bodies)熱能。
4. When you pop afrozenwaffle into the toaster, electricalenergy turns into heat energy.
4、當你取出(pop)一塊冷凍餅放進(into)烤面包機時，電能轉化成了熱能。
5. Intheinternal-combustion engineof a car, an electric spark explodes gassesin the cylinder; the heat energymoves the pistons,becomingmechanical energytomove the car.
5、在汽車的內燃機引擎里，電火花引爆氣缸里的燃料氣體，然后熱能推動活塞，成為機械能推動汽車行駛。
6. Inasteam engine, the chemical energy of fuel is changed to heat energy; theheatedwater, now steam, forces the pistons to move. Ina steam turbine, the steam pushesagainst blades. In both cases, mechanical energyresults.
6、在蒸汽機里(in a steam engine)，燃料里的化學能轉化成熱能，加熱水，成為水蒸汽，推動活塞運動。在燃氣輪機里(in a steam turbine)，水蒸汽推動的是葉片。在這兩種情況中，都是機械能起的作用。
7. This changingfromone form of energytoanothercan continue almost indefinitely. If, for instance, the steam engine or turbineis connected toa generator, the mechanical energy can become electrical energy,whichcan become heatenergy (for the electric stove), mechanical energy (for the washer), etc.
7、能量從一種形式轉化為另一種形式的變化幾乎能夠平穩連續進行。比如說，如果蒸汽機或者蒸汽輪機和一個發電機聯接起來，那么機械能就可以轉化成電能，然后轉化成熱能（比如電爐）、機械能（如洗衣機）等等。
8. Thus, energy readily changes back and forth fromone formtoanother.Whatstartsoutasone form of energymay beatotallydifferent formwhenit reaches its final use.
8、因此，能量可以輕易地(readily)從一種形式到另一種形式來回轉換。從最初的能量形式到最后的使用形式，能的形態可能已經完全改變了。
RadiantEnergy 輻射能
9. Radiant energy is also calledlight energy. Our most importantsource of radiant energy is, of course, the sun. Without itthere would be no life,forplant life dependsupon radiantenergy-and wedepend uponplant life.
9、輻射能也稱作光能。當然，我們人類最重要的光能的來源就是太陽。沒有太陽，就沒有生命，(因為for)植物的生命依賴輻射能，而我們依賴植物的生命。
10.Otherforms of radiant energy familiar to us areradio waves, infrared rays, ultra-violet rays, X rays, and gamma rays.
10、我們熟悉的另外一些形式的輻射能是電磁波、紅外線、紫外線、X射線和伽瑪射線。
Mechanical Energy 機械能
11. In simplest terms, this is the energy of amoving object. Your heartbeat, thepushingof a lawn mower, a baseballspeedingthrough the air, waterfallingonto a waterwheel, the prying up of a rock with a crowbar-allaremechanical energy,which,of course, was another form of energyearlier.
11、用最簡單的術語來描述，機械能就是移動著的物體擁有的能量。你的心臟跳動、推進割草機、棒球在空中高速飛過、水落入水輪機、用撬杠撬開石頭等等，所有這些都是機械能，當然，在轉化之前它是另一種能量形式。
ElectricalEnergy 電能
12. Electrical energy usuallyhas to be changed toanother formbeforeit actually doeswhatwe want it to do. In the toaster, it changes to heat; ina tiny wrist watchor a subwaytrain ora 75,000 horse-powerindustrial motor, it changes to mechanical energy. In an industrialprocesscalledelectrolysis, it changes to chemical energy.
12、通常情況下，電能必須先轉化為另一種形式的能，才能為我們所用。對烤面包機來說，電能轉化成熱能，在一個小小的手表里或者地鐵列車里或者一臺75000馬力的工業電動機里，電能轉化成機械能。在所謂的電解工業的過程中，它轉化成化學能。
ChemicalEnergy 化學能
13.Variousfuelssuch ascoal, gas, oil and foodarecommonexamples of chemical energy. These fuels give off heatwhentheyburn. The process is called combustion or oxidation, and the heat itself is a form of energy. Man usesthe energy from some kind of fuelfor everythingfromflying to the moontothinking about it.
13、最常見的化學能包括煤、天然氣、石油、和食物等各種各樣的燃料。當這些燃料燃燒時釋放出熱能。這個過程我們稱之為燃燒或者氧化反應(oxidation)，同時熱本身也是能量的一種形式。人們從不同燃料中得到能量，并用這些能量做任何事情，大到飛上月球，小到頭腦的思考。
14. A special kind of chemical energy is nuclear energy, sometimes called atomic energy. These namescomefromthe factthatthe source of energy thenucleus, or core, of the atom.Nuclear fuelssuch asplutoniumand uranium give off heat energywhen fission (the splitting of atoms in these fuels) occurs. Alreadywe have seen tremendous advances inthe use of nuclear energy for peaceful purposes, and many people see nuclearenergyasthe future answertoalmost all of our energy need.
14、核能(nuclear energy)是一種特殊的化學能，有時候我們稱之為原子能(atomic energy)。這個名稱來自于能量來源于原子核這樣的事實。當核燃料，例如钚和鈾，發生核裂變（fission）時釋放出（give off）熱能（在這些燃料中原子發生分裂）。我們已經看到和平利用核能所帶來的巨大好處（tremendous advances），并且很多人認為核能可以看作解決未來人類能源需求問題的答案。
15. Energy-the kind of magic we can't live without.
15、能，是與人類生存息息相關的一種魔力。(我們生活中不能缺少能量，它是一種神奇的物質。)
