The essence of globalization – free trade – rests on the theory of comparative advantage, which views international trade as profitable even for a country that can produce every commodity more cheaply (in terms of labor or all resources) than any other country.
全球化的本质——自由贸易——建立在比较优势理论上，比较优势理论认为，即使对于可以比其他所有国家都较为廉价地生产所有商品的国家（以劳动力或全资源角度衡量），国际贸易仍然是有利可图的。