改进题：Nations will usually produce and export those goods in which they have the greatest comparative advantage, and import those items in which they have the least comparative advantage.
译文：各国通常都生产和出口那些他们最具比较优势的产品，而进口那些他们最不具比较的产品。
【正确答案】：改进的译文：各国通常都生产和出口那些他们最具比较优势的产品，而进口那些他们最不具比较优势的产品。
【题目解析】：p111
改进题：Nations will usually produce and export those goods in which
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