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中国城市发展资源效率水平普遍偏低,整个中国只有五城市GDP是绿色的,更多城市的GDP是黑色,中国黑色经济增长已经难以持续
The efficiency level of urban development resources in China is generally low. Only the GDP of five cities in China is green and the GDP of more cities is black. The growth of black economy in China has been hard to sustain.