dual conomic structure的用法和樣例：
例句
- The first part has a discussion on the theory of dual economic structure and the demonstrational analysis on it.
第一部分論述了二元經濟結構理論及實證分析。 - The dualistic economic structure existing in China for a long time has led to the lack of a social security system in rural areas.
摘要長期二元經濟結構存在帶來的負面影響，使農村社會保障制度嚴重缺失。
