At present, 68.4 percent of urban residents in China use gas; the centralized disposal rate of urban sewage is 20 percent; the innocuity rate of urban garbage and fecal disposal is 45.4 percent; and the afforestation rate is 23.8 percent.是什么意思_At present, 68.4 percent of urban residents in China use gas; the centralized disposal rate of urban sewage is 20 percent; the innocuity rate of urban garbage and fecal disposal is 45.4 percent; and the afforestation rate is 23.8 percent.在线翻译_英语_读音_用法_例句