电信专业英英词典V

 

　　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.

1 aperture   

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   

[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   

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   

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   

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   

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   

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   

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   

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   

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   

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。