使主体与背景在影调或色调上有适当的差异，或形成鲜明的对比；
The subject and background in the tone or color difference on the right, or contrast;
定性方法更加注重现象和行为与背景之间的关系，现象和行为的变化过程，现象和行为对于行为主体所具有的意义。
Qualitative approach emphasizes the relationships between behavior, phenomenon and their background, the process of their changes and the meaning that behaviors and phenomena have towards the actors.
但后者只是对前者的背景映衬，其主体仍然是传承系统的知识构架与传承方式恪守的原则。
But the latter is only the background for the former Its principal part is still the imparting methods structure of imparting system and the principles abided by the imparting methods.
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