城市规模分布研究是城市规划中的一项基础性研究工作，对准确预测城市人口规模以及合理确定城镇体系结构具有非常重要的意义。
Study of population size hierarchy is the groundwork of the city planning. It is important to the population forecast of cities and urban system planning.
这种通过双层模式所构建的主题图式能很清晰地表示某个主题的知识体系，对准确地表达主题思想具有指导作用。
This bi-level pattern topic schema can clearly embody the knowledge structure of a topic and have instruction to the main idea.
本文也算是笔者的一项有益探索，希望能对准备建立或正在实施绩效管理体系的企业起到一些借鉴作用。
So this paper can be considered as a helpful exploration, and the author wishes it could function as a reference to those enterprises which are ready to constitute or are implementing the PMS.
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