The first part has a discussion on the theory of dual economic structure and the demonstrational analysis on it. 第一部分论述了二元经济结构理论及实证分析。
The dualistic economic structure existing in China for a long time has led to the lack of a social security system in rural areas. 摘要长期二元经济结构存在带来的负面影响，使农村社会保障制度严重缺失。
