city proper cycle economy

• 城区循环经济

city proper cycle economy的用法和样例：

例句

1. Certain city areas have been singled out for special treatment.
   某些城区已划出要进行特别治理。
2. She seems to be prospering since she moved out of the city.
   她搬出城区以后，似乎一帆风顺。