电信专业英英词典C-3

　　City Code - Some foreign countries require you to dial a city code before the phone number you are trying to reach.

　　Clamp - A circuit that removes the energy dispersal signal component¹ from the video waveform.

　　Clarke Orbit - This is the circular orbit in space 22,237 miles from the surface of the earth at which geosynchronous satellites are placed to revolve² around the earth. It is named after Arthur C. Clarke, who first postulated³ its existence. Satellites in these orbits move at speeds that cause their angular velocity⁴ to match the angular rate of the rotation⁵ of the earth, causing them to appear stationary⁶ when viewed from a particular point on Earth.

　　Clear to Send (CTS) - This is when a receiving modem⁷ tells the calling modem.

　　C/N (Carrier to Noise Ratio) - This is the carrier-to-noise-ratio, which is the ratio of the received carrier power to the noise power in a given bandwidth; it is expressed in decibels⁸ (dB), which is a logarithmic scale.

　　CO - See central office.

　　Codec - A coder/decoder system for transmitting digital data.

　　Color Subcarrier - A particular subcarrier that is added to the main video signal; its purpose is to convey the color information.

　　Columns - A column contains an item of data within a row.

　　Command - This is a software instruction that causes a specific job to be done.

　　Command Buffer⁹ - This is a memory place where commands are store temporarily.

　　Command Set - A collection of commands. (See Command.)

　　Commercial Internet (.com) - This is the part of the internet that is provided by commercial services, allowing business usage of the internet.

　　Common Carrier - Any organization which operates communications circuits used by other people. Common carriers include the telephone companies as well as communications satellite owners, AT&T and others.

　　Communication Channel - This is a type of circuit, and it is a two-way information pathway.

　　Communications Protocol¹⁰ - These are procedures used to ensure a standardized¹¹ transmission occurs.

1 component   

n.组成部分，成分，元件；adj.组成的，合成的

参考例句：

• Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
• Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。

2 revolve   

vi.(使)旋转；循环出现

参考例句：

• The planets revolve around the sun.行星绕着太阳运转。
• The wheels began to revolve slowly.车轮开始慢慢转动。

3 postulated   

v.假定，假设( postulate的过去式和过去分词 )

参考例句：

• They postulated a 500-year lifespan for a plastic container. 他们假定塑料容器的寿命为500年。
• Freud postulated that we all have a death instinct as well as a life instinct. 弗洛伊德曾假定我们所有人都有生存本能和死亡本能。 来自辞典例句

4 velocity   

n.速度，速率

参考例句：

• Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
• The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。

5 rotation   

n.旋转；循环，轮流

参考例句：

• Crop rotation helps prevent soil erosion.农作物轮作有助于防止水土流失。
• The workers in this workshop do day and night shifts in weekly rotation.这个车间的工人上白班和上夜班每周轮换一次。

6 stationary   

adj.固定的，静止不动的

参考例句：

• A stationary object is easy to be aimed at.一个静止不动的物体是容易瞄准的。
• Wait until the bus is stationary before you get off.你要等公共汽车停稳了再下车。

7 modem   

n.调制解调器

参考例句：

• Does your computer have a modem?你的电脑有调制解调器吗？
• Provides a connection to your computer via a modem.通过调制解调器连接到计算机上。

8 decibels   

n.分贝( decibel的名词复数 )

参考例句：

• The typical lawn mower makes about 90 decibels of noise. 典型的割草机发出的声响约为90分贝。 来自《简明英汉词典》
• A normal conversation reaches 55 decibels. 普通的谈话即可达55分贝。 来自《简明英汉词典》

9 buffer   

n.起缓冲作用的人(或物)，缓冲器；vt.缓冲

参考例句：

• A little money can be a useful buffer in time of need.在急需时，很少一点钱就能解燃眉之急。
• Romantic love will buffer you against life's hardships.浪漫的爱会减轻生活的艰辛。

10 protocol   

n.议定书，草约，会谈记录，外交礼节

参考例句：

• We must observe the correct protocol.我们必须遵守应有的礼仪。
• The statesmen signed a protocol.那些政治家签了议定书。

11 standardized   

adj.标准化的

参考例句：

• We use standardized tests to measure scholastic achievement. 我们用标准化考试来衡量学生的学业成绩。
• The parts of an automobile are standardized. 汽车零件是标准化了的。