Thanks to the growth of urban lighting sys-tern,nights in China’s cities are becomingbrighter.By the end of 1991,there were al-together 1.25 million road lamps in largeand medium-sized cities across thecountry,while ...Thanks to the growth of urban lighting sys-tern,nights in China’s cities are becomingbrighter.By the end of 1991,there were al-together 1.25 million road lamps in largeand medium-sized cities across thecountry,while before 1949 only a展开更多
文摘Thanks to the growth of urban lighting sys-tern,nights in China’s cities are becomingbrighter.By the end of 1991,there were al-together 1.25 million road lamps in largeand medium-sized cities across thecountry,while before 1949 only a
