由于电子通讯和信息交换技术的广泛使用，导 致传统意义的信函越来越少。与此同时，人们却发现，来自电信、银行等行业部门的数量极大，种类丰富的商业信函正在蓬勃发展，并且逐渐取代传统信函而成为邮政行业的主要业务，产生着可观的经济效益。 与人们日常生活关系最为密切的 Due to the widespread use of electronic communications and information exchange technologies, there have been fewer and fewer conventional letters of correspondence. At the same time, however, people find that a great variety of business letters and telecommunications from banks, branches and other business sectors are booming and have gradually replaced traditional letters and become the main business of the postal industry, resulting in considerable economic benefits. Most closely related to people’s daily life