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电信专业英英词典V

时间：2006-08-18 16:00:00

（单词翻译:单击）

 

　　VAD

　　value-added distributor

　　VAN

　　value-added network

　　VAR

　　value-added reseller

　　VBR

　　variable bit rate

　　VCI

　　virtual circuit identifier

　　VCS

　　virtual circuit switch

　　Very Small Aperture1 Terminal (VSAT)

　　VSATs are earth terminals using small antennas2 (1.5 6 feet in diameter). This technology typically operates in the Ku band (11/14 GHz), and Ka band (20/30 GHz).

　　Video Conferencing

　　Video conferencing is the real-time, usually two-way transmission of voice and images between two or more locations. Today, both voice and video analog3 signals are digitized by video codices before transmission which can involve wide bandwidths. To conserve4 bandwidth, some systems employ "freeze frame," where a television screen is only "repainted" every few seconds. Codecs for higher quality full motion video attempt to minimize bandwidth requirements by taking advantage of intervals5 with relatively6 little motion (which require smaller bandwidths), and by trading off smooth motion tracking and picture resolution.

　　Virtual Private Networks (VPN)

　　VPNs are services using public network facilities augmented7 by network control point and service management system facilities wherein traffic is routed through the public network under computer control in a manner that makes VPN service indistinguishable from dedicated8 facilities based private networks. Customers can define, change and control network resources with the same or more flexibility9 as afforded by facilities based private networks.

　　VPI

　　virtual path identifier

　　VPN

　　virtual private network

　　VRU

　　voice response unit

　　VSAT

　　very small aperture terminal

　　Virtual Host - A Web site that includes a customized Domain10 Name and unique IP address to your home page, giving the appearance that you have your own server directly connected to the Internet.

　　VoIP  -  (Voice over Internet Protocol11)  -  A technology used to transmit voice over a data network using Internet Protocol, such as the Internet or intranet networks.


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1 aperture IwFzW     
n.孔，隙，窄的缺口
参考例句：
  • The only light came through a narrow aperture.仅有的光亮来自一个小孔。
  • We saw light through a small aperture in the wall.我们透过墙上的小孔看到了亮光。
2 antennas 69d2181fbb4566604480c825f4e01d29     
[生] 触角，触须（antenna的复数形式）
参考例句：
  • Marconi tied several antennas to kites. 马可尼在风筝上系了几根天线。 来自超越目标英语 第3册
  • Radio astronomy today is armed with the largest antennas in the world. 射电天文学拥有世界上最大的天线。
3 analog yLDyQ     
n.类似物，模拟
参考例句：
  • The analog signal contains high-frequency video information,which helps make up the picture.模拟信号包括有助于构成图像的高频视频信息。
  • The analog computer measures continuously,without proceeding step by step.模拟计算机不是一步一步地进行，而是连续地进行量度。
4 conserve vYRyP     
vt.保存，保护，节约，节省，守恒，不灭
参考例句：
  • He writes on both sides of the sheet to conserve paper.他在纸张的两面都写字以节省用纸。
  • Conserve your energy,you'll need it!保存你的精力，你会用得着的！
5 intervals f46c9d8b430e8c86dea610ec56b7cbef     
n.[军事]间隔( interval的名词复数 )；间隔时间；[数学]区间；（戏剧、电影或音乐会的）幕间休息
参考例句：
  • The forecast said there would be sunny intervals and showers. 预报间晴，有阵雨。
  • Meetings take place at fortnightly intervals. 每两周开一次会。
6 relatively bkqzS3     
adv.比较...地，相对地
参考例句：
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
7 Augmented b45f39670f767b2c62c8d6b211cbcb1a     
adj.增音的 动词augment的过去式和过去分词形式
参考例句：
  • 'scientists won't be replaced," he claims, "but they will be augmented." 他宣称：“科学家不会被取代；相反，他们会被拓展。” 来自英汉非文学 - 科学史
  • The impact of the report was augmented by its timing. 由于发表的时间选得好，这篇报导的影响更大了。
8 dedicated duHzy2     
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。
9 flexibility vjPxb     
n.柔韧性，弹性，（光的）折射性，灵活性
参考例句：
  • Her great strength lies in her flexibility.她的优势在于她灵活变通。
  • The flexibility of a man's muscles will lessen as he becomes old.人老了肌肉的柔韧性将降低。
10 domain ys8xC     
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 protocol nRQxG     
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。