并列题名：Study on the evolution of economic structure in Asia-Pacific: 1950-2010 Study on the evolution of economic structure in Asia-Pacific: 1950-2010 并列题名：Study on the evolution of demonstratives in archaic Chinese 并列题名：A Study of the Transformation of the Dual Economic Structure in China's Urban and Rural Areas 并列题名：Study on the evolvement of spatial structure in Yangtze River economic zone