1. But a single optical fiber with a diameter of less than half a millimeter can carry more information than a large cable made of copper wires.
    但是单单一根直径小于半毫米的光纤电缆就可以比由铜丝制成的粗电缆负载更多的信息。

2. By installing optical fiber, digital switches, and the latest wireless transmission systems, a parade of urban centers and industrial zones from Beijing to Budapest are stepping directly into the Information Age.
    由于安装了光纤电缆、数字转换器和最新的无线传输系统，从北京到布达佩斯的一系列城区和工业区正在直接跨入信息时代。

3. By the end of 1995, each of China's provincial capitals except for Tibet will have digital switches and high-capacity optical fiber links.
    到1995年底，中国除了西藏以外的省会都将有数字转换器和高容量的光纤网。

4. To lick this problem, Russia is starting to install optical fiber and has a strategic plan to pump $40 billion into various communications projects.
    为了解决这一问题，俄国已经开始铺设光纤电缆，并制定了投入400亿美元建设多种通信工程的战略计划。

5. He has an optical defect.
    他有种视力缺陷。

6. He has an optical defect.
    他有种视力缺陷。

7. Despite a per person income of just $220 a year, all of the 300,000 lines Vietnam plans to add annually will be optical fiber with digital switching, rather than cheaper systems that send electrons over copper wires.
    尽管越南人均年收入只有220美元，它计划每年增加的30万条线路将全部为有数字转换的光纤电缆，而不是那些以铜线传送电子信号的廉价系统。