编者按：随着我国经济建设的飞速发展和经济体制、科技体制改革的深人，许多民营科技企业的发展已进人了二次创业的新阶段。为适应这一形势的需要，北京革新技术产业丹发试验区对中关材的民营科技企业发展机制进行了深人的调查研究，并在此基础上，写成了“民营高技术企业二次 Editor’s Note: With the rapid development of China’s economic construction and the deepening reform of the economic system and science and technology system, the development of many private science and technology enterprises has entered a new stage of second pioneering. In order to meet the needs of this situation, Danfa Experimental Zone of Beijing Innovation Technology Industry conducted a deep investigation and study on the development mechanism of the privately-owned science and technology enterprises of Zhongguancun, and on this basis, wrote "Private High-tech Enterprises Secondary