概念问题国家通常按照它们各自的发展阶段被分成不同的类别.在最广义的方面,我们有发达国家和发展中国家的区分.后者又往往被称为未发展国家、不发达国家、欠发达国家、新兴国家、南方国家、第三世界和其它种种名称。目前通用的词是LDC,即欠发达国家。世界银行又把欠发达国家分为低收入国家,中低收入国家,中高收入国家和高收入石油出口国家。其 Countries with conceptual problems are often grouped into different categories according to their respective stage of development. In the broadest sense, we have the distinction between developed and developing countries, which are often referred to as undeveloped, underdeveloped, underdeveloped Countries, emerging countries, countries of the South, the Third World and many more. The current general term is LDC, the less developed countries. The World Bank, in turn, divided the less developed countries into low-income countries, low- and middle-income countries, high-income countries and high-income oil exporters. its