A caste system consists of ranked groups, each with a different economic specialization.

种姓制度由等级群体组成，每个群体具有不同的经济专业化。

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There has been increased economic specialization throughout the country.

整个国家的经济专门化程度越来越高。

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Specialization is considered key to economic efficiency because different individuals or countries have different comparative advantages.

因为不同的个人或者国家有不同的“比较优势”，专业化被认为是经济效率的关键。

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Free trade is the happy process that allows us to acquire as much as possible for as little as possible, all the while boosting our individual economic specialization.

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When individuals in other nations suffer the economic pain of inflation through declining investment, we too hurt for the natural expansion of the global division of labor that authors our economic specialization being halted to varying degrees.

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Indeed, economic thinkers of the World War II era understood that free trade was a growth-enhancing gift for promoting economic individual specialization and cooperation among global producers, and that a lack of unfettered trade in the 1930s arguably gave us the horror that was World War II.

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