通信工程专业英语翻译

Unit 6

Part B

1. Desktop systems allow remote users to share CAD files as well as other office documents created in spreadsheets, word processors, presentation packages, etc.

桌面系统让远程用户能够共享计算机辅助设计档案以及其他一些制作在电子表格、文字处理器、图像程序包中的办公室文件。

3. At the World’s Fair 1964, AT&T demonstrated its first videophone, a desktop (or countertop)configuration that provided low quality images using analog technology.

在1964年的世界博览会上，美国电话电报公司展示了其首款可视电话-一种桌面（或台式）机器。因为使用的是模拟技术，它提供的图像质量不高。

5. Today, systems level implementers have to live within the constraints of standards-based compression algorithms, since standards are the foundation for interoperability, which in the communications field is absolutely necessary.

如今，系统水平的操作者不得不受限于基于标准的压缩算法，因为标准时互用性的基础。而在通行领域，互用性是极其重要的。

Part A

1. The word “multimedia”is being used to describe a mixture of hardware, software and applications, with a consequent confusion in people’s mind as to what it is.

“多媒体”一词被用来描述硬件、软件及应用的混合体。这让人们在头脑里产生了“多媒体到底是什么”的疑惑。

4.In the modern presentation of multimedia we now have the technology that can begin to move towards an ability, already held by the human being, in that by using computer technology, such as CD-ROM, not only can we bring together audio and visual images but also be interactive with other computer users. 现在我们拥有接近某种人类能力的技术，即通过使用计算机技术，比如CD-ROM，我们不仅能够将视频图像和音频汇聚到一起，还能与其他的计算机用户进行相互交流。多媒体现代内涵中包含了这一点。

7. The two levels are MPEG-1, which sets the provision of consumer quality of video and audio and MPEG-2,which sets the higher standards for professional, broadcast images and also looks to define high definition television(HDTV).

这两个标准是MPEG-1和MPEG-2。MPEG-1是用户质量的音频和视频标准；MPEG-2确定了更高的专业级广播图像标准并用以制定高清晰电视（HDTV）的标准。

Unit 5

Part B

1. During the first and second generations different regions of the world pursued different mobile phone standards, but are

converging to a common standard for mobile multimedia called Third Generation(3G)that is based on CDMA technology.

在第一和第二移动通信时代时间范围内的不同地区追求着各自不同的移动通信电话标准，但现在都在向基于CDMA技术的3G移动多媒体的共同标准靠拢。

4. Three generations of mobile phones have emerged so far, each successive generation more reliable and flexible than the last.

迄今为止，已先后出现了三代移动电话，而且一代比一代更可靠、更灵活。

5. Digital mobile phone systems added fax, data and messaging capabilities as well as voice telephone service in many countries.

数字移动电话系统除了能在众多国家内进行语音电话服务外，还增加了传真、数据、信息传递功能。

6. Following on the heels of analog and digital technology, the Third Generation will be digital mobile multimedia offering broadband mobile communications with voice , video, graphics, audio and other information.

紧跟模拟和数字技术的步伐，第三代将会是数字移动多媒体技术。它将会向宽带移动通信提供声音、视频、图片、音频和其他信息。

8. These are all derivatives of the World Wide Web aimed at connecting different communities of interest.

这些都是万维网的衍生物，其目的在于能与不同的对象进行联系。

9. The data transmission rates will depend upon the environment the call is being made in it is only indoors and in stationary environments that these types of data rates will be available. 数据传输速率将取决于呼叫环境，只有在室内和固定环境下才能达到这种速度。

●10.Third Generation（3G）facilitates several new applications that have not previously been readily available over mobile networks due to the limitations in data transmission speeds.

3G 促进了一些新的应用，而这些应用在先前的移动通信网上由于数据传输速率的限制不太容易实现。

Part A

●1.GSM(Global System for Mobile communications )全球移动通信系统。

2.BST 基站收发器

BSC 基站控制器

MSC 移动交换中心

PSTN 公共交换的电话网络

5. The speed and rapidity with which the personal communications revolution takes place is, unlike fixed