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希罗多德“埃及是尼罗河的恩赐”的名言,说明尼罗河在古代埃及文明形成和发展中的重要作用。在对当代国家的研究中,地理因素也是无法忽略的问题。《是什么使美国如此强大》
Herodotus “Egypt is the gift of the Nile”, which illustrates the important role of the Nile in the formation and development of ancient Egyptian civilization. In the study of contemporary countries, the geographical factor is also an issue that can not be neglected. “What made the United States so powerful?”