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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...