Report on the frontier research in ecological civilization 并列题名：Report on the frontier research in ecological civilization Report on the frontier research in China's realities Report on the frontier research of Marxism in China 并列题名：Report on the frontier research in China's realities Ecological principles in ecological civilization Report on the frontier research in Europe 封面题名：Report on the frontier research in China's realities Research on the theory and system of ecological civilization 并列题名：Research on the theory and system of ecological civilization