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、我們時時刻刻討論著能：“能量食物”，“能源危機”，等等。如果要我們?nèi)ソo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?！?BR> 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、確實，電是能量中的一種。但是，能量可以來自多種形式。你看不見、聞不到、也品嘗不了能，但是，它始終存在著，關(guān)于能量，最吸引人的就是，它具有從一種形式轉(zhuǎn)換成另外一種形式的能力，簡直如同魔術(shù)。這些轉(zhuǎn)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。
Heat Energy
熱能
3.When a fuel unites with 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、當燃料與氧氣結(jié)合，我們就說燃料開始燃燒了，實際發(fā)生的是化學能（燃料與氧氣）轉(zhuǎn)化成熱能。當燃料（我們吃的食物）與我們呼吸的氧氣結(jié)合，我們獲得我們身體運動所需的熱能。
4.When you pop a frozen waffle into the toaster,electrical energy turns into heat energy.
4、當你取出一塊冷凍餅放進烤面包器時，電能轉(zhuǎn)化成了熱能。
5.In the internal-combustion engine of a car,an electric spark explodes gasses in the cylinder;the heat energy moves the pistons,becoming mechanical energy to move the car.
5、在汽車的內(nèi)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.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、在蒸汽機里，燃料里的化學能轉(zhuǎn)化成熱能，加熱水，成為水蒸汽，推動活塞運動。在燃氣輪機里，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 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、能量從一種形式轉(zhuǎn)化為另一種形式的變化幾乎能夠平穩(wěn)連續(xù)進行。比如說，如果蒸汽機或者蒸汽輪機和一個發(fā)電機聯(lián)接起來，那么機械能就可以轉(zhuǎn)化成電能，然后轉(zhuǎn)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 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，能量可以輕易地從一種形式到另一種形式來回轉(zhuǎn)換。從最初的能量形式到最后的使用形式，能的形態(tài)可能已經(jīng)完全改變了。
1、我們時時刻刻討論著能：“能量食物”，“能源危機”，等等。如果要我們?nèi)ソo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?！?BR> 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、確實，電是能量中的一種。但是，能量可以來自多種形式。你看不見、聞不到、也品嘗不了能，但是，它始終存在著，關(guān)于能量，最吸引人的就是，它具有從一種形式轉(zhuǎn)換成另外一種形式的能力，簡直如同魔術(shù)。這些轉(zhuǎn)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。
Heat Energy
熱能
3.When a fuel unites with 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、當燃料與氧氣結(jié)合，我們就說燃料開始燃燒了，實際發(fā)生的是化學能（燃料與氧氣）轉(zhuǎn)化成熱能。當燃料（我們吃的食物）與我們呼吸的氧氣結(jié)合，我們獲得我們身體運動所需的熱能。
4.When you pop a frozen waffle into the toaster,electrical energy turns into heat energy.
4、當你取出一塊冷凍餅放進烤面包器時，電能轉(zhuǎn)化成了熱能。
5.In the internal-combustion engine of a car,an electric spark explodes gasses in the cylinder;the heat energy moves the pistons,becoming mechanical energy to move the car.
5、在汽車的內(nèi)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.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、在蒸汽機里，燃料里的化學能轉(zhuǎn)化成熱能，加熱水，成為水蒸汽，推動活塞運動。在燃氣輪機里，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 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、能量從一種形式轉(zhuǎn)化為另一種形式的變化幾乎能夠平穩(wěn)連續(xù)進行。比如說，如果蒸汽機或者蒸汽輪機和一個發(fā)電機聯(lián)接起來，那么機械能就可以轉(zhuǎn)化成電能，然后轉(zhuǎn)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 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，能量可以輕易地從一種形式到另一種形式來回轉(zhuǎn)換。從最初的能量形式到最后的使用形式，能的形態(tài)可能已經(jīng)完全改變了。