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北京大学出版社1999年9月出版的《经济学原理》一书总结了经济学非常重要的一条原理——贸易可以使每个人状况更好。该原理清晰地解释了人们为什么与他们周围的人交易,一个国家为什么与其他国家交易。人们为什么选择在物品与劳务上依靠其他人?这种选择如何改善了人
The Principles of Economics, published in Peking University Press in September 1999, summarizes a very important principle in economics - trade can make everyone better off. This principle clearly explains why people deal with people around them and why a country deals with other countries. Why do people choose to rely on others for goods and services? How does this alternative improve people