求翻译：而中间的第三、第四部分对我国个人所得税现状、存在问题以及国外发达国家有关个人所得税公平的研究与实践发展情况等则以实证分析为主，是什么意思？

Fair the middle of the third and fourth part of personal income tax status quo, there are problems and developed countries on the personal income tax situation of research and practice development are empirical analysis mainly

In the middle of the 3, 4 part of my personal income tax situation, there is a problem, as well as developed countries overseas for personal income tax equity research and practice development, it is an empirical analysis,

But middle third, the fourth part to our country personal income tax present situation, the existence question as well as the overseas developed country concerns the personal income tax fair research and the practice development situation and so on by the real diagnosis analysis primarily,

Part while the middle third, fourth on the present situation and existing problems of individual income tax in China and developed countries interested individuals, such as income tax equity research and practice development are dominated by empirical analysis,

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