an overview study of sustainable development in European Union 从战略到行动：欧盟可持续发展研究：an overview study of sustainable development in European Union Top design study on sustainable development of highway in China Poverty reduction and sustainable development in western China Study on sustainable development of ecotourism an interpretation of sustainable development for enterprises 并列题名：Top design study on sustainable development of highway in China 并列题名：Poverty reduction and sustainable development in western China Study on sustainable development of coal industry Theory of sustainable development in urban settlements