Colombian Coffee

Analysis on the Experience of Floriculture Industry Growing Up in Colombia;

哥伦比亚花卉产业成功崛起经验分析

U.S. Policy Toward Colombia s Drugs Since 1980s;

二十世纪八十年代以来美国对哥伦比亚反毒外交政策研究

A Historic Analysis on Columbus Action;

对哥伦布行为的历史分析

Christopher Columbus Discovers Americas Background-cartography;

哥伦布发现美洲的背景—地图学

How ever, after Columbus the numerous heavyweight-navigators appeared in the West, it leaded to the great discovery for the ear.

本文旨在通过对郑和与哥伦布现象的比较分析深入研究这一发展规律的必然