求翻译：本文以2008—2010年的沪深两市上市公司为样本，结合生命周期理论，研究了处于不同的企业生命周期下两职设置对公司绩效的影响。是什么意思？

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This article in 2008 - 2010 the Shanghai and Shenzhen stock markets listed companies as a sample, in combination with the life-cycle theory, and research in a wide variety of enterprises under life cycle two civilian settings affect the Company's performance.

This article take 2008-2010 year Shanghai deep two market city company as the sample, the union life cycle theory, studied has been in the different enterprise life cycle next two duty establishment to the company achievements influence.

In this paper, 2008-2010 is the sample of listed companies in Shanghai and Shenzhen, combined with the life cycle theory are studied in different ' structure under the enterprise life cycle effects on company performance.

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