产业结构作为资源的转换器，是把各种投入要素转化为产品和劳务以满足社会需求。

As the converter of resources, industry structure transforms kinds of factors input into goods and services to meet the social needs.

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城市化作为一项国策，对于扩大需求、缩小城乡差别、调整产业结构具有深远的意义。

As a national policy, urbanization has profound and lasting significance for expanding demand, eliminating disparity between town and country and regulating industry structure.

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本文重点论述农村产业结构优化的自然动力、需求动力、科技动力、政策动力。

This paper mainly discusses the natural force, force of requirement, technological force, force of policy for enterprise structure optimization.

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