Scientific Knowledge:the Unity of Objectivity and Subjectivity Based on Practice

Starting from emphasizing the objectivity or pursuing the ideal state of scientific knowledge,the rationalism leads itself to absolutism and thinks that scientific knowledge is absolutely objective.While starting from expressing the subjectivity or pursuing the actual state of scientific knowledge,the social constructivism leads itself to relativism and thinks that scientific knowledge is absolutely subjective.In fact,scientific knowledge is neither absolutely objective nor absolutely subjective,but a unity of objectivity and subjectivity based on practice.