求翻译：毛泽东同志在马克思辩证唯物主义的基础上，结合中国具体的社会实践，深刻地揭示了认识与实践的密切联系。是什么意思？

On the basis of Marx's dialectical materialism, Comrade Mao Zedong, combined with China's concrete practice profoundly revealed the close ties of understanding and practice.