最后，在总结全文的基础上，概括本文的中心论题，以为结论。
The final part makes a summary of my conclusions, epitomizing the central ideas of this thesis.
全文结构如下：第一章阐述了研究背景和研究思路，提出本文的中心论题；
The full text structured as follows : chapter I is the background and research ideas, bringing forward the central theme of this paper;
论文的中心论题是找出重大环境污染事故罪存在的问题，并在此基础上探讨如何完善。
The central theme of this paper is to find out the existing problems on the Crime on Major Environmental Pollution Accident and explore how to improve them on this basis.
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