实践“三个代表”重要思想的关键在于坚持与时俱进 ,核心在于保持党的先进性 ,本质在于坚持执政为民。这三个方面构成了“三个代表”重要思想的整体 ,它们之间是相互联系、互为补充的 ,这也是贯彻和理解“三个代表”重要思想的根本要求。深入理解和贯彻“三个代表”重要思想 ,是在新的历史条件下对马克思列宁主义、毛泽东思想和邓小平理论的进一步认识 ,是马克思主义理论在中国的又一次飞跃 The crux of the practice of the important thinking of the ’Three Represents’ lies in insisting on keeping pace with the times and the core lies in maintaining the advanced nature of the party. The essence lies in insisting on running for power for the people. These three aspects constitute the whole of the important thinking of the ’Three Represents.’ They are interrelated and complementary. This is also the fundamental requirement for implementing and understanding the important thinking of the ’Three Represents.’ To thoroughly understand and carry out the important thinking of the ’Three Represents’ is a further understanding of Marxism-Leninism, Mao Zedong Thought and Deng Xiaoping Theory under the new historical conditions and is another leap in Marxist theory in China