security of the border meaning in Chinese

边境安宁

This part is the center of the whole article , putting forward countermeasures to realize the sustainable development of the western area based on the analysis and evidence of the former parts , mainly including the program of the process of the great exploitation , basic facility construction , construction of the ecological environment , population and talents , the adjustment of the industrial constructure and the relation among nationalities and security of the border of the western area
第三部分：实现西部地区可持续发展的对策分析本部分为全文的中心，在前文分析论述的基础上，提出了实现西部地区可持续发展的对策措施，主要包括西部大开发的进程规划问题、西部地区的基础设施建设问题、西部地区的生态环境建设问题、西部地区的人口和人才问题、西部地区的产业结构调整问题以及西部地区的民族关系和边疆安全问题。