Urban DNA城市DNAurbanadj.城市的；都市的urban rainwater drainage system城市排水系统Urban Green Space System Layout城市绿地系统布局urban yearly water requirements城市年需水量urban-rural integration level城乡一体化程度urban tourism spatial structure城市旅游空间结构urban light-rail construction城市轻轨建设urban civilization construction城市文明建设urbanization of the countryside农村城镇化urban areas helping rural areas以城带乡urban steam pipe network system城市蒸汽管网

1. They have learned how to thrive in urban litter and filth.
   它们学会了如何在城市垃圾中繁衍。
2. Municipal refuse is the main contamination source of soil and groundwater.
   城市垃圾填埋场渗漏是土壤和地下水污染的重要来源。