任何商业范围中,最有兴趣、最重要和最具有挑战性的事情就是理解和管理不断变化的情况。十年来,很少有什么工业能比通信工业更迅速地适应变化了的要求和技术。实际上,通信技术每隔二、三年就会发生一次重大的进展。通信上的突飞猛进,不仅表现于实验室里技术改革的提高,还包括把技术应用到政府、商业和一般公众的日常通信需要中去。 The most interesting, important, and challenging aspect of any business scope is understanding and managing changing conditions. Few industries have been able to adapt to changing requirements and technologies more quickly than the communications industry in a decade. In fact, significant advances in communications technology take place every two or three years. Rapid advances in communications have not only been reflected in technological advances in laboratories, but also in the application of technology to everyday communications needs of governments, businesses and the general public.