Everybody knows that electricty is very important for us. And it helps us a lot in our daily life.
2.Without electricity we can not use lamp, TV, computer or other things. Then it will be not very convenient for us. Our world may be in the dark.
3.But in fact, the electricity isn't much. So we all should save the energy.
4.For example,when we leave rooms,we should turn off the lamp. When we are not using the computer we should turn it off.
5.All of our people should save the energy from the bottom of your heart.
1.中文翻译:每个人都晓得电对我们很重要,他帮助了我们很多在我们的生活中。没有了电,我们不能使用台灯,电视,电脑以及其他东西,这就对我们生活造成了不便。我们的世界可能会漆黑一片。但事实上,世界上的电并没有很多。所以我们应该节约能源。例如当我们离开房间时候,我们应该关掉台灯。当我们不用电脑时,我们也应该改关掉它。我们每个人都应该改从内心深处有省电的意识。
2.作文赏析:这篇文章虽然辞藻不够华丽,但是列举了很多生活中我们浪费电的现象,唤起了人们省电的意识!
初二关于电的英语作文
英语作文范文 电的重要性When you go to work in the morning and find that traffic lights don't work, the traffic jam will certainly happen. A patient needs to be operated on at once. What will happen if the operation cannot be made because of the electricity. Without electricity, we can neither watch TV, listen to the tape, nor chat on line. Electricity is closely related to our daily life.How terrible it would be if there were no electricity!
有关电的英语文章
Electricity is the science, engineering, technology and physical phenomena associated with the presence and flow of electric charges. Electricity gives a wide variety of well-known electrical effects, such as lightning, static electricity, electromagnetic induction and the flow of electrical current in an electrical wire. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.Electrical phenomena have been studied since antiquity, though advances in the science were not made until the seventeenth and eighteenth centuries. Practical applications for electricity however remained few, and it would not be until the late nineteenth century that engineers were able to put it to industrial and residential use. The rapid expansion in electrical technology at this time transformed industry and society. Electricity's extraordinary versatility as a means of providing energy means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. Electrical power is the backbone of modern industrial society, and is expected to remain so for the foreseeable future.[ 初一水平太难了吧,几乎都没多大词汇……
翻译一篇“电与我”的英语作文
电和我电是力量。
有十亿的电流环绕着我们每一天的生活。
电是最重要的能量之一,我们人们每一天都要使用的。
没有了电,我们不能生存。
在你的家里有很多电器用具都要依靠电的能量, 在我看来,电可以使用在电缆,烧饭,洗东西,洗澡,冷却等等。
但是电对我们来说也是非常危险的。
如果我们触碰到一个电线,我们可能会受伤,因为这个能量可能会传输到你的手上。
我们应该小心用电。
本杰明·富兰克林是最著名的发明电的人之一,他的发明在那个时候已经非常成功了。
他发现到如果人们使用电,电可能会更加的特殊的。
在另一方面,他告诉我们电不但重要而且还会改变我们的生活。
电是我们生活中最重要的公仆之一。
希望对你有帮助哦~
有关“电从哪里来”的英文文章
The other voice that whispers reassurances that everything is fundamentally okay simply delivers its message with quiet confidence. Once we hear it, we know it speaks the truth. Generally, once we have heard what it has to say, a powerful sense of calm settles over our entire being, and the other voices and sounds, once so dominant, fade into the background, suddenly seeming small and far away. We may find that our own communications in the world begin to be influenced by the quiet certainty of this voice. We may be less inclined to indulge in idle chatter as we become more interested in maintaining.
谁有节约水和电的英文作文
protect the water Water is a kind of liquid. It has no taste or smell. It is transparent, too. Water is useful and is important to us. Why? For example, we use water to water the plants. We use water to wash our face or to have a bath. We drink water or we will die…Water is also very important for China. There are 2.8 hundred millions of steres of water in China, but everyone can only use 2300 steres. It is only twenty–five per sent in the world. Not too long ago, there was a man called Jacques Cousteau. He loved the beautiful colors, and the beautiful fish in the sea. However, when he returned some years later, the colorful coral reefs were dead and grey because the factory near the sea poured waste water into the sea. Jacques Cousteau decided to tell people how important it was to save the environment under the sea. He started the“ Cousteau Society ” to help protect life in the sea. Now there are over 30000 members all over the world. Since water covers most of the earth, Cousteau knew that we should keep the sea clean. We should not litter the sea, and should clean up the dirty parts. As water is very important to our environment, he encouraged everyone to take part in protecting our lakes, rivers, sea and ocean. There are still a few people who are not protecting the water now in the world. For example, some factories pour waste things into the rivers, lakes or into the sea near by. The water there has become very dirty and we can't use them at all. Although there are seventy–five per sent of water in the world, we can only use fresh water, that there is only a little. So we should use little water when we need to use it. For example, I do not use too much water when I am washing my face or having a bath… It is important for us to keep the water clean. You may ask yourself, have I ever poured or thrown dirty things into the water? If your answer is “No”, that means you have already helped to protect the environment. It is our duty to protect the environment. You may ask yourself again, have I ever helped to clean up the water? If your answer is “Yes”, that means that you have already done something useful to improve the water. If we use up all the water, it is difficult for us to get it from anywhere, including the universe. It is terrible to think that people are too thirsty to live! I believe, that if everyone helps to protect the water, the water must be protected. You do not want to “kill” your son or your grandson, do you? So now let us to protect the water! Please don't let the last drop of water on the earth is we human's tear!
如何节约用电的英语作文
Economize on electricity, is not only our each person's responsibility and the duty, accumulates over a long period of time can also leave not a small expense for us from the hexacene. Kills two birds with one stone, why not? The expert reminds, the family should select as far as possible conserves energy the lamp, although price high spot, but saves 75% electric powers compared to the ordinary incandescent lamp, moreover the service life is long-time. After the washer should store as far as possible suffices the clothing, satisfiedly uses again, after each time uses, should clean up the strainer promptly. When uses the microwave oven, should chooses microwave oven's firepower according to the cooking food category and quantity, after refrigeration food suitable defrosts beforehand, carries on the cooking again. Family of three select and purchase 140 to 180 liter capacity refrigerators is most suitable, the population are few, but the refrigerator capacity is too big, not only occupies the place moreover also to consume electricity. Usually should guarantee as far as possible the refrigerator gate nearby the rubber clings, avoids frequently the switch refrigerator gate. In the summer is drawing near, the air conditioning will become uses electricity the wealthy and powerful family, therefore, when purchases the air conditioning must select most suits a room size number the air conditioning; When opens the air conditioning, must guarantee that the windows and doors shut tightly; If the periodic cleaning separates this world, may save 30% electric powers. The expert also reminds, all electrical appliances have one “the general character”, is “loves cleanly”, maintains electric appliance's clean frequently, can the varying degree enhance them to work “the enthusiasm”, saves many electrical bill expenditures
以我们用电做很多事情为题写英语作文
al safety.These influences can be described as follow. Initially,the elementary school killing accident cause the students'panic,worrying about their own safety.What's more,it also cause the parents'and teathers' worry,and parents and teachers must pay more attention to their children's and student's safety.Last but not least,due to this,many other people hold panic for their own safety. From what we have discussed ,we know the serious consequence of killing accident in elementary schoo甫触颠吠郯杜奠森订缉l.So facing this accident,relative department should take effective measures to reduce the killing accident in elementary school,reducing the social panic,assuren...
如何节约用电的英语作文70字
Electricity plays a very important role in our life today,we can not live without it.In our country,we have using it for about 50 years.But,we have to know,in the same time,a large part of it was wasted,it's polluted environment around us.as a student,we should like using the air-conditioner less often,turning off the light upon leaving,reminding family members of the importance of saving electricity and so on.As a saying puts," Actions speak louder than words",please join in the action to save electricity,from yourself,from now on.Action!
急求电力专业英语文章及翻译 !!明天就要交了 求路过大神帮小弟一...
已经发给你了,这里是个备份。
======================Often a differential equation is Fig.3.10 solved by integration. The integration may be accomplished by analytical methods or by numerical methods on a digital computer. Integration may also be performed electronically with an op-amp circuit. Indeed, op-amps were developed initially for electronic integration of differential equations.(1) An Integrator. The op-amp circuit in Fig.3.11 uses negative feedback through a capacitor to perform integration.We have charged the capacitor in the feedback path to an initial value of U1, and then removed this prebias voltage at t=0. Let us examine the initial state of the circuit before investigating what will happen after the switch is opened . Since u+ is approximately zero, so will be u_, and hence the output voltage is fixed at –U1. The input current to amplifier, Ui/R, will flow through the U1 voltage source and into the output of the op-amp. Thus the output voltage will remain at – U1 until the switch is opened.After the switch is opened at t=0, the input current will flow through the capacitor and hence the Uc will be ( 公式 ) Thus the output voltage of the circuit is ( 公式 )(3.10) Except for the minus sign, the output is the integral of Ui scaled by I/RC, which may be made equal to any value we wish by proper choice of R and C.(2) Scaling and Summing. We need two other circuits to solve simple differential equations by analog computer methods. Scaling refers to multiplication by a constant, such as ( 公式 ) where K is a constant. This is the equation of an amplifier, and hence we would use the inverting amplifier in Fig.3.3 for the – sign or the noninverting amplifier in Fig.3.5 for the + sign.A summer produces the weighted sum of two or more signals.Fig.3.12 shows a summer with two inputs. We may understand the operation of the circuit by applying the same reasoning we used earlier to understand the inverting amplifier. Since u-=0, the sum of the currents through R1 and R2 is ( 公式 )(3.11)The output voltage will adjust itself to draw this current through RF, and hence the output will thus be the sum of U1 and U2, weighted by the gain factors, RF/R1 and RF/R2 , respectively. If the inversion produced by the summer is unwanted, the summer can be followed by an inverted, a scalier with a gain of – 1. Clearly, we could add other inputs in parallel with R1 and R2. In the example to follow, we shall sum three signals to solve a second order differential equation.时常一个微分方程式是根据整合解决的 Fig.3.10 。
整合可能是完成的藉着分析方法或在一部数传计算机上的数字方法。
整合也可能电子地被一个 op-安培的线路所运行。
的确, op-安培最初为微分方程式的电子的整合发展。
(1) 一个整合之人。
在 Fig.3.11 的 op-安培的线路使用否定回应完成的一个电容器运行整合。
我们有充满感情的电容器在那回应路径到一起始 U1 的价值, 然后离开的这一 prebias 电压在 t=0. 让我们调查那起始状态线路在调查什么将会发生之前在那之后开关是打开。
自从 u 以后+ 大约是零, 因此意志是 u_, 和因此输出电压是固定的在 -U1.那输入对喇叭筒,Ui/R, 的涌流将会流过 U1 电压来源和进入 op-安培的输出之内。
如此输出电压将会保持在 - U1 直到开关是打开。
在那之后开关是打开在 t=0, 那输入现在的意志流过电容器和因此 Uc 将会如此是 ( 公式 ) 线路的输出电压是 ( 公式 )(3.10) 除为那负号告示, 输出是那整体 Ui 是依比例决定被我/RC, 可能是制造与任何的相同价值我们希望被适当的选择 R 和 C。
(2) 剥落而且总计。
我们需要其他二个线路解决类比计算机方法的简单微分方程式。
剥落提及一个常数的乘法, 像是 K 是哪里( 公式 ) 一常数。
这是喇叭筒的相等, 和因此我们会在 Fig.3.3 使用反转喇叭筒为那 - 告示或非反转喇叭筒在 Fig.3.5 为那 + 告示。
夏天农产品那重量总数二或更多 signals.Fig.3.12 表演夏天与二输入。
我们可能藉由应用相同的推论我们了解线路的操作二手的早了解反转喇叭筒。
自从 u 以后-=0, 涌流完成的 R1 和 R2 的总数是 ( 公式 )(3.11)输出电压将会经过射频对平局这涌流调整它本身, 和因此输出将会如此是那总数 U1 和 U2, 重量被那增益因素、射频/R 1 和射频/R 2, 分别地。
如果倒转是生产在夏天之前是不必要的, 夏天能是跟随被一反转, 一有鳞的与一增益 -1. 清楚地, 我们可以把其他的输入加入平行与 R1 和 R2. 在例子中跟随, 我们将总数三信号解决一第二次序微分方程式。
关於电的作用英语文章,初一的
The Importance of Electricity(电的重要性)When you go to work in the morning and find that traffic lights don't work, the traffic jam will certainly happen. A patient needs to be operated on at once. What will happen if the operation cannot be made because of the electricity. Without electricity, we can neither watch TV, listen to the tape, nor chat on line. Electricity is closely related to our daily life.How terrible it would be if there were no electricity! 采纳我啊
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