第三部分，阐明基本概念的基础上，分别从集群内企业间合作与竞争两个角度，探讨群内企业间网络——主体与主体间的活动对于集群竞争力的影响。

From the perspectives of cooperation and competitiveness, the third part discusses the impact of network relationship-the activity between body and body on the competitiveness of enterprise clusters.

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本文首先从企业资源的流动性与企业间相互依赖程度的相关性的角度，对企业组建虚拟企业联盟的合作动力进行了初步分析。

The cooperative drive of setting up ve is analyzed from the point of the relativity consisted in the fluidity of the virtual enterprise resource and the interdependence between enterprises.

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企业与企业间（B2B）长期、紧密的合作关系有助于减少风险和降低交易成本。

The high quality of relationships of business to business(B2B) can reduce risks and trade costs.

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