求翻译：本文的研究目的在于如何将项目管理理论更好地应用到项目建设的实践中。在实际运用中，通过实施项目计划和控制，使项目能够在合理的时间内完成，从而进一步挖掘项目管理在工程实践中的作用，实现较好的社会效益和经济效益。是什么意思？

This study aims to better application of project management theory to the practice in the construction of the project. In practical use, through the implementation of project planning and control, so that projects can be completed within a reasonable amount of time, so as to further tap the role of project management in engineering practice and achieve better social and economic benefits.