电信专业英英词典D-3

　　Duplex Transmission - This is the capability¹ for simultaneous data transmission between a sending and receiving station.

　　Dual² Tone Multi-Frequency (DTMF) - This is when two tones are used to represent each digit³ dialed on a telephone.

　　Dumb Switch - This is a switch that contains only basic switching equipment and need to be instructed by an outside source.

　　Dumb Terminal - This is a terminal with no programming or processing capabilities⁴, and it is used primarily for information entering.

　　Duplex - (1) This term refers to the condition where two-way, simultaneous transmission is possible. (2) It is also the technical term for a common, electrical wall outlet⁵.

　　DVB - This stands for Digital Video Broadcasting and is the European-backed project to standardize⁶ elements of digital video.

　　补充：

　　Dedicated⁷ Service - A connection to the Internet using a leased line that provides for very fast, high bandwidth connections. Also called permanent direct service.

　　Digital - An advanced type of radio transmission that broadcasts voice or data intact via radio waves, which allows for greater call clarity, advanced wireless⁸ features and improved voice capacity. The industry uses three types of digital technology: TDMA, CDMA and GSM.

　　Dialup Service - A connection that allows you to access the Internet by dialing into a computer through a modem⁹ and telephone line.

　　Directory - While there is no single source or official Internet directory, there are several search vehicles available to research or access information on the WWW. Directories categorize and list information in specific headings or categories.

　　DNS - See Domain¹⁰ Name System

　　Domain Name - A unique name that identifies an Internet site; the Domain Name will always have at least two parts separated by dots (for example: tds.net or tdsnet.com). These names are granted and controlled by a centralized Internet Network Information Center (InterNIC), administered by the National Science Foundation.

　　Domain Name System (DNS) - A system by which one Internet host can find another. DNS translates words (Domain Names) into numbers that Internet computers can understand.

　　Download - To transfer of a file or information from another computer to yours.

　　Digital Subscriber¹¹ Line (DSL) - A DSL line transmits simultaneous voice and high-speed data over existing copper¹² telephone wires without the need of additional phone lines.

1 capability   

n.能力；才能；(pl)可发展的能力或特性等

参考例句：

• She has the capability to become a very fine actress.她有潜力成为杰出演员。
• Organizing a whole department is beyond his capability.组织整个部门是他能力以外的事。

2 dual   

adj.双的；二重的，二元的

参考例句：

• The people's Republic of China does not recognize dual nationality for any Chinese national.中华人民共和国不承认中国公民具有双重国籍。
• He has dual role as composer and conductor.他兼作曲家及指挥的双重身分。

3 digit   

n.零到九的阿拉伯数字，手指，脚趾

参考例句：

• Her telephone number differs from mine by one digit.她的电话号码和我的只差一个数字。
• Many animals have five digits.许多动物有5趾。

4 capabilities   

n.能力( capability的名词复数 )；可能；容量；[复数]潜在能力

参考例句：

• He was somewhat pompous and had a high opinion of his own capabilities. 他有点自大，自视甚高。 来自辞典例句
• Some programmers use tabs to break complex product capabilities into smaller chunks. 一些程序员认为，标签可以将复杂的功能分为每个窗格一组简单的功能。 来自About Face 3交互设计精髓

5 outlet   

n.出口/路；销路；批发商店；通风口；发泄

参考例句：

• The outlet of a water pipe was blocked.水管的出水口堵住了。
• Running is a good outlet for his energy.跑步是他发泄过剩精力的好方法。

6 standardize   

v.使符合标准，使标准化

参考例句：

• We will extend and standardize legal services and provide effective legal aid.拓展和规范法律服务，积极开展法律援助。
• There is a drive both to standardise components and to reduce the number of models on offer.正在为实现零部件标准化和减少推出的型号数量而努力。

7 dedicated   

adj.一心一意的；献身的；热诚的

参考例句：

• He dedicated his life to the cause of education.他献身于教育事业。
• His whole energies are dedicated to improve the design.他的全部精力都放在改进这项设计上了。

8 wireless   

adj.无线的；n.无线电

参考例句：

• There are a lot of wireless links in a radio.收音机里有许多无线电线路。
• Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。

9 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。

10 domain   

n.(活动等)领域，范围；领地，势力范围

参考例句：

• This information should be in the public domain.这一消息应该为公众所知。
• This question comes into the domain of philosophy.这一问题属于哲学范畴。

11 subscriber   

n.用户，订户；（慈善机关等的）定期捐款者；预约者；签署者

参考例句：

• The subscriber to a government loan has got higher interest than savings. 公债认购者获得高于储蓄的利息。 来自辞典例句
• Who is the subscriber of that motto? 谁是那条座右铭的签字者？ 来自辞典例句

12 copper   

n.铜；铜币；铜器；adj.铜(制)的；(紫)铜色的

参考例句：

• The students are asked to prove the purity of copper.要求学生们检验铜的纯度。
• Copper is a good medium for the conduction of heat and electricity.铜是热和电的良导体。