求翻译：为了有效研究社会资本对区域技术创新的影响，本研究引入了研发经费支出、研发人员投入与外资利用作为控制变量。是什么意思？

In order to effectively study social capital on the regional impact of technological innovation, this study introduces the R & D expenditure, R & D investment and foreign capital used as a control variable.

In order to effectively study on social capital and the influence of regional technical innovations introduced the R&D expenditures for research, research and development staff with foreign capital utilization as a control variable inputs.

In order to study the social capital effectively to the region technological innovation influence, this research introduced the research and development funds disbursement, has researched and developed the personnel investment and the foreign capital use takes the control variable.

In order to effectively study the impact of social capital for regional technology innovation, this study the introduction of the research and development expenditures, investment in research and development personnel and foreign capital utilization as a control variable.

In order to effectively study the impact of social capital for regional technology innovation, this study the introduction of the research and development expenditures, investment in research and development personnel and foreign capital utilization as a control variable.