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1、河北理工大学轻工学院电气工程及其自动化姓名 学号Switches and FusesAn electric switch is often on a wall near the door of a room（增减词译法省略对room的翻译）. Two wires lead to the lamp in the room. The switch is fixed in one of them. The switch can cause a break in this wire, and then the light goes. The switch can also join。the wire
2、again, then we get a light（引伸译法 get a light翻译为灯亮了）.Switch can control many different things. Small switches control lamps and radio sets because these do not take a large current, larger switches control electric fires. Other switches can control electric motors.Good switches move quickly.（增减词译法） Th
3、ey have to stop the current suddenly. If they move slowly, an electric spark appears. It jumps across the space between the two ends of the wire. This is unsafe and it heats the switch. Very big switches are sometimes placed in oil, Sparks do not easily jump through oil（引伸译法jump翻译为产生）, and so the oi
4、l makes the switch safer.A large current makes a wire hot. If the wire is very thin, even a small current makes it hot. This happens in an electric lamp.（引伸译法）The electric wires in a house are covered with some kind of insulation. No current can flow through the insulation, so the current can never
5、flow straight from one wire to the other, but the insulation on old wires is often broken, then the copper of the two wires can touch. A large current may flow, and if this happens, the wires will get very hot. Then the house may catch fire.Fuses can stop this trouble. A fuse is only a thin wire whi
6、ch is easily melted. It is fixed in afuse-holder(科技术语的意义). The fuse-holder is made of some material which cannot burn.（ 词序处理法）A large current makes the fuse hot and then it melts away. We say that the fuse blows(烧断). The wire is broken and no current can flow. So the house does not catch fire, but a
7、ll the lights and electric fires go out because there is no current. （词序处理法）When a fuse blows, something is wrong.（引伸译法） We must find the fault first. Perhaps two wires are touching. We must cover them with new insulation of some kind. Then we must find the blown fuse and repair it. We put a new pie
8、ce of fuse- wire in the holder. (Sometimes we can find the right fuse- holder because it is rather warm, but the others are cold.) If we do not repair the fault first, the new fuse will blow immediately.Some men get angry when a fuse blow. So they put a thick copper wire in the fuse-holder! Of cours
9、e this does not easily melt; if the current rises suddenly, nothing stops it. The thick wire easily carries it（引伸译法）. Then the wires of the house may get very hot and the house may catch fire. Some of the people in it may not be able to escape. They may lose their lives. So it is always best to use
10、proper fuse-wire. This will keep everyone and everything in the house safe.翻译开关和保险丝电源开关往往在靠近门的墙上。两条电线连接控制房间里的灯。该开关是固定在其中的一个。该开关可导致断开这根电线，然后灯熄灭。该开关还可以把电线接上，灯就又亮了。灯开关可以控制很多不同的事情。小开关控制灯和收音机，因为这些不采取大电流，更大的开关能够控制电炉。其他开关可控制电动马达。良好的开关能开和关这个动作非常快。他们必须能突然停止电流。如果他们行动缓慢，电火花就会出现。它跳跃在两条线端之间的空隙跳跃。这是不安全的，它加热的开关。有时
11、是非常大的开关放在油，电火花在油里不能轻易产生，所以油使开关更安全。大电流使导线热。如果导线是非常细，即使是很小的电流使它变热。电灯炮就是这样工作的。房子里的电线被绝缘类的东西包裹着。没有电流流过的绝缘体，因此电流无法从一根电线流向另一根电线，但对旧电线绝缘皮往往是坏了，那么这两个铜导线可以触摸。大电流可能流过，如果发生这种情况，电线会变得非常热。然后房子可能会着火。保险丝能阻止这种麻烦。一个保险丝只是一个很容易融化的细电线。这是固定在一个熔断器座（保险盒）。保险丝的熔断器座是用不能燃烧的物质做的。大电流使保险丝变热，然后融化了。我们说的导火索“烧断”。该线断了，没有电流能流过了。所以房子不会
12、着火了，但所有的灯和电器因为没有电流停止工作。当保险丝烧断，说明某些地方出了问题。我们必须先找到出故障的地方。也许两个电线相互接触了。我们必须用新的绝缘材料包裹它们。然后，我们必须找到保险丝熔断并修复它。我们把新的保险丝放到熔断器座上。如果我们不首先修复故障，新的保险丝就会被熔断。有些人在保险丝熔断时非常生气。所以他们在保险盒里放粗铜线！这当然不容易熔化;若突然电流上升，没有什么能阻止它。厚厚的电线容承受它。然后，房子的导线可能会变得很热，房子可能会着火。对其中的一些人可能无法逃脱。他们可能会失去他们的生命。因此，它始终是最好用正确的熔断丝。这将让每个人都在家里，一切都安全。Descripti
13、ve abstract: The switch can cause a break in this wire, and then the light goes. The switch can also join。the wire again, then we get a light.Switch can control many different things. Butsometimes switch can notswitchoff current. Then the house may catch fire. Fuses can stop this trouble.When the current is so large that can make a fire, it will melt away. So it is always best to use proper fuse-wire. This will keep everyone and everything in the house safe.Keywords(关键词): Switches, Fuses, blows ,fuse-holder
