专业英语
专业英语
小语种学习网The electric resistance is measured in Ohms
电阻的测量单位是欧姆
All metals do not conduct electricity equall well
并⾮所有的电阻都是同样好的导电
The moment the circuit is completed，,a current will start flowing the coil
电路⼀旦接通，电流开始流向线圈
托福听力下载Some special alloy steels should be ud for such parts becau the alloying elements make them tougher ,stronger,or harder than carbon steels
对这类零件可以采⽤某些特殊的合⾦钢，因为合⾦元素能提⾼钢的韧性，强度，硬度
New us have been fond for old metals ,and new alloys have been made to satisfy new demands
⽼的⾦属有了新的⽤途，新的⾦属被冶炼出来，以满⾜新的需要
The ability to program the devices will make a student an invaluable ast to the growing electronic industry
编程这些器件的能⼒将使学⽣成为⽇益增长的电⼦⼯业领域的⽆价⼈才
The computer took over an immen range of tasks from works muscles and brains
计算机取代了⼯⼈⼤量的体⼒和脑⼒劳动
Like charges repel each other while opposite charges attracted
同性电荷相排斥，异性电荷相吸引华师大二附中地址
With the development of electrical engineering ,powercan be transmitted over long distances
随着电⽓⼯程的发展，电⼒能输送的⾮常远
Power plugs are male electrical connectors that fit into female electrical sockets
电源插头可以插⼊电源插座
The charge current depends upon the technology and capacity of the battery being charge
充电电流的⼤⼩根据充电技术和电池容量的不同⽽不同
This wave guide tube is chiefly characterized by its simplicity of structure
这种波导管的主要特点是结构简单
With slight repairs the television trans mitters can be ud
只要稍加修理，这台视频发射机就可⽤了
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A continuous increa in the temperature of a gas confined in a container will lead to a continuous increa in the interal pressure within the gas
不断提⾼密封容器内⽓体的温度，会使⽓体的内压⼒不断增⼤listening
This lack of resistance in very cold metals may become uful in electronic computer 这种在甚低温中⾦属没有电阻的现象，可能对电⼦计算机很有作⽤
The lower the frequency is ,the greater the refraction of a wave will be
频率越低，波的折射作⽤就越强
The moving parts of a machine are of oiled that friction may be greatly reduced
机器的各个可动部件被润滑油润滑
cultureshockThe first electronic computer ud vacuum tubes and other components and this made equipmemnt very large and bulky
第⼀代电⼦计算机使⽤电⼦管和其他元件，这使设备⼜⼤⼜笨
The material is said to behave elastically
我们说，这种材料具有弹性
The frequency,wavelength and speed of sound are cloly related
声⾳的频率，波长和速度三者密切相关
In general ,all the metals are good conductors,with silver the best and copper the cond
⼀般来说，⾦属都是良导体，其中银最佳，铜次之
This lar beam covers a very narrow range of frequency
这个激光束的频率范围很窄
Then came the developmemt of the microcomputer
后来，微型计算机发展起来了
Electronic computer of various types are produced in our country
我国⽣产各种类型的计算机
The rearch for even better magnetic material is a part of the modern frontier of physic
研制更好的磁性材料是现代物理学的尖端之⼀
All of us know that the conductivity of miconductors change with temputerature
我们都知道，半导体的导电性随温度⽽变化
Rubbing , or friction , give very little electricity
摩擦只能产⽣少量的热
As we know , electrons revolve about the nucleus, or center ,of an atom
正如我们所知，电⼦围绕原⼦核旋转
In this ca both the pul spacing and the group length are incread by eight times 在这种情况下，脉冲间隔及脉冲组长度均增加了8倍
Switching time of the new-type transistor is shortened four times
新型晶体管的开关时间缩短为原来的1/4
The loss of electricity was reduced by afactor of three
电的损耗减少到原来的1/3
It is said that the production of transistor radios was incread six times from 1970 to 1974
据说从1970年资⾄1974年间晶体管收⾳机的产量增长了五倍
This device needs repairing
这套设备需要修理
The magnetic field is produced by an electric current
磁场由电流产⽣
Devices utilizing a static voltage as the controlling signal are called voltage-controlled devices
利⽤⼀个电压作为控制信号的器件叫做电压控制器件
A diode is an electrical device allowing current to move through it in one direction with greater ea than in the otherlongkou
⼀个⽅向流过⼆极管的电流远⼤于另⼀个⽅向
When placed in a simple battery-lamp circuit , the diode will either allow or prevent current through the lamp ,depending on the polarity of the applied voltage
当在⼀个简单的电池-电灯，电路中串联⼀个⼆极管后，根据所加的电源的极性不同，⼆极管会出现导通电流或阻碍电流流过电灯的现象
When measuring current ,the circuit must be opened and the meter inrted in ries with circuit or component to be measured
当测量电流时，必须断开电路，将万⽤表与待测电路或元器件串联
It may also have a polarity switch to facilitate revesing the test leads
还有⼀个极性开关可以很⽅便交换测试笔的极性
The skills acquired are uful in electrical engineering areas
获得的技能在电⽓⼯程领域是⼗分有⽤的
A miconductor diode consists of a PN junction made of miconductor material
⼀个半导体⼆极管是由⼀个半导体材料制成的PN结构成的
Compared to a conventional process control system ,number of wires needed for connections is reduced by 80%
与传统的控制据系统⽐较，所需的连接线减少了80%
Resistor is made variable to be able to adjust sufficient feedback voltage to cau oscillation
电阻是可调的，可调节到iyou⾜够的反馈电压以引起电路的振荡
It is very difficult to measure the passing current in insulators
测量绝缘体中通过的电流失很困难的
To do this ,we must introduce the concept of a “ioop”
为了这么做，必须引⼊“回路”的概念
Tesla’s work on induction motors and poly-pha system influenced the field for years to come
特斯拉关于感应电动机和多相输电系统的研究到今天还影响着电⽓⼯程领域High efficency implies that circuit loss be minimum and the ratio of the transistor output, the parallel equivalent resistance , and its collector load resistance be maximum鸿蒙是什么意思
⾼效率意味着电路损耗应最⼩，⽽晶体管输出⽐率，并联等效电阻及集电极负载电阻应最⼤
Audio signals are attenuated very rapidly , so we would have to be within a few hundred feet of the o
riginating source in order to hear the signal
⾳频信号衰减很快，所以要在距离声源⼏百英尺范围以内才能听到它
This flow of electrons driven through a conductor is called an electric current
greatness
这种被驱动通过导体的电⼦流称为电流
We ofen referred to the rays as radiant matter
我们过去常称这些射线为放射性物质
Radio waves are regarded as radiant energy
⽆线电波被看作是辐射能
The ability of a capacitor to store electrical energy is termed capacitance
电容器储存电能的能⼒叫电容
A transformer is compod of some coils that are coupled together by magnetic induction
变压器由磁感应耦合线圈组成
ISDN is new rvice offered by many telephone companies that provides fast ,high-capactity digital transmission of voice
,data still images and full-motion video over the worldwide telephone network
综合业务数据⽹是由电话公司提供的新型业务，该业务可在世界范围的电话⽹上进⾏语⾔，数据，静⽌图像和运动视频的快速，⼤容量数字传输
When the pointer stops moving ,the reading given by the ohmmeter is the insulation resistance, which is normally high if the capacitor is in good condition
指针停⽌移动时的读数就是绝缘电阻值，假如电容器正常⼯作，绝缘电阻值通常很⾼
First of all ,let’s introduce you to some of the circuits that are commonly found in radio-frequency systems and with which you may not be familiar
⾸先让我们向你介绍射频系统中常见的⼀些电路，或许你不熟悉他们
The analog world is full of relative numbers, tradeoffs,and approximations all of which depend heavily on the basic miconductor properties
模拟电⼦技术领域充满了相对数，折中和近似值，所有这些在很⼤程度上取决于半导体的基本特性
Direct current is an electric the charges of which move in one direction only
打雪仗的英文
直流电是电荷只向⼀个⽅向流动的电流
The GPS receiver compares the time a singal was transmitted by a satellite with time it was received
GPS接收机把卫星发送信号的时间和接收信号的时间相⽐较
Microwaves ,which have ahigher frequency than radio waves ,are ud routinely nding thousands of telephone calls and television progras across long distance
微波⽐⼀般⽆线电波信号的频率更⾼，它通常被⽤来远距离的传送⼤量的长途电话和电视节⽬
