求翻译：民营企业发展至今，已经历了一段波折的历程。有的民营企业在不断发展中摸索壮大，很快成长成为国民经济的生力军，成长为国内外的知名企业，可有的企业却在摸索和探寻中，不断衰退，最终走向失败和倒闭。那么究竟是什么原因导致中国民营企业发展良莠不齐？是什么原因影响了中国民营企业的发展？这个问题也是中国经济学专家、学者研究者和企业家门所困扰的问题。是什么意思？

Development of private enterprises has experienced some ups and downs of the course. Some private companies continue to explore the development and growth, rapidly growing force in the national economy, growth is well-known enterprises at home and abroad, can some companies are in the exploration an

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The private enterprise developed, already has until now undergone a section of twists and turns course.Some private enterprises are being developed unceasingly try to find out expand, the very quick growth becomes the national economy the new force, grows into the domestic and foreign well-known ent

Private enterprise development to date, has experienced twists and turns of the course. Constant trial and in the development and expansion of private enterprise, quickly growing to become the main force of the national economy, growth for domestic and foreign famous enterprises, some companies are

Private enterprise's developed, already has until now undergone a section of twists and turns course.Some private enterprises are being developed unceasingly try to find out expand, the very quick growth becomes the national economy the new force, grows into the domestic and foreign well-known enter