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A new generation of greenways has emerged in recent years, the most ambitious of which are nationwide, interconnected networks of multi-use, multi-purpose greenways and trails, clustered under a single national vision. However, because these initiatives have been the focus of so few research studies, opportunities to glean lessons from their planning and implementation have been limited. This paper contributes to addressing this knowledge gap by presenting a comparative account of two networks, the Trans Canada Trail in Canada and Sendero de Chile in Chile. Using document analysis and interviews with officials closely involved in their development, the evolution of both networks is documented over time, emphasizing similarities and differences related to their planning and implementation. Both initiatives have faced significant challenges in reaching their connection goals and have availed themselves of a diverse range of opportunities and strategies to advance their agendas. A simple model of a virtuous cycle is proposed to highlight the positive feedback—between political and public support, sustained funding, partnership development, accessibility for urban residents, and connectivity of the network—generated by sustained network expansion over time. It is hoped that the insights offered from this analysis may offer guidance to inform the development of similar scale projects elsewhere.  相似文献   
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张北根 《史学月刊》2003,4(7):48-53
英国对中国的内战持中立态度,不支持包括直系在内的任何一方;在直系参战期间,英国扣留了直系的军火;英国虽然同情吴佩孚,但未向吴提供军火和经济援助;为维护英国在华权益,英国损害直系的权威;英国对包括吴佩孚在内的军阀采取的策略是“等着瞧”。不将“赌注”押在任何一派军阀身上;英国也不支持直系的另一将领孙传芳。因此,英国不是直系的后台。  相似文献   
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