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中文摘要：
进入21世纪，生态城市规划建设成为研究的热点，也逐步为社会各界所共识。构建生态枢纽、恢复和提升城市复合生态系统自净能力和服务功能，成为建设生态城市的关键环节。本文提出了现代化生态城市建设中生态枢纽的概念，阐述了其内涵和分类，总结了它所拥有的自然景观轴心、气候调节、生态安全、生物多样性和集约发展等五大功能效应。最后以南京为例，对城市生态枢纽规划的条件、方案选择以及相应措施进行了实证分析。
英文摘要：
Upon entering the 21st century, planning and building of eco-city has not only become a hotspot of research, but also gradually got to the common understanding of the whole society. It is the most important of all to renew and upgrade the depurative ability of urban-compound-ecosystem by building coo-hub. This article puts forward the conception and meaning of eco-hub, summarizes its five categories of functions, including land- scape axis effect, climatic modification effect, intensive economic development effect, biodiversity effect and eco-safety effect. It emphasizes the necessity to build eco-hub, and taking Nanjing city as an example, analyses the conditions, schemes and corresponding measures for eco-city building. The following conclusions are drawn. Firstly, with the development of modern eco-city, it is necessary to plan and build eco-hub. We should build a multiple ecosystem in order to solve questions brought by urbanization and industrialization. Being the ＂CBD＂ of this system, eco-hub must be built first. Secondly, eco-hub becomes the key step to upgrade the function of multiple ecosystem because by its powerful function it can combine each natural element and improve its efficiency. This can make full use of multiple coo-system, and the city function instead of manpower. Thirdly, environment can turn better and better by natural despite of rapid development of economy and tech- nology in China in the new century, building eco-hub is a long and hard work. Each of us should do something for it.
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