求翻译：郑和下西洋是世界航海史上的奇迹，但却与地理大发现失之交臂。郑和下西洋在动机目的、组织形式、思想文化等方面与哥伦布航行都有很大的差异。只有从这些层面展开剖析，才能对郑和下西洋为何未能完成地理大发现做出合理的历史解释。是什么意思？

Zheng He's voyages is a miracle in the history of the world sailing, but the great geographical discovery missed. Zheng He's voyages has a very different motivation purposes, forms of organization, ideology and culture, and Columbus sailed. Only from these levels to expand the analysis, in order to

Zheng He's voyages is the world's maritime history of the miracle, but with the chance discovery. Zheng He's voyages to the motivation, organization, ideology and culture, etc. Colombo sailing with a great deal of difference. It is only from the level in order to be able to analyze and Zheng He reas

Under Zheng He the Western world is in the world navigation history miracle, but just misses actually with the geography big discovery.Under Zheng He the Western world in aspects and Columbus and so on motive goal, organization form, thought culture navigates all has the very big difference.Only the

Zheng is a miracle in the history of navigation in the world, but with the great geographical discoveries up. Zheng He in terms of motivation aims, organization, ideology and culture and Columbus voyage has a great deal of difference. Only from the analysis of the level, to Zheng why fails to comple

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