The cost question has naturally become one of the key issues in the economics study as well as the major problem focused on by economists in real world.

因此，成本问题就理所当然的成为经济学研究的最重要的问题之一，现实世界中也一直是经济学家研究的主要问题。

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This study focuses on the inter-county transfer of the rural surplus labor force by the development of county economy which is a major route to solve the "rural" issues.

由于目前关于农村剩余劳动力县域内转移的研究尚处于初步阶段，因此，本文的研究对于目前解决农村剩余劳动力转移问题提供了借鉴意义。

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