municipal wastewater of small-sized cities and towns

• 小城镇污水

municipal wastewater of small-sized cities and towns的用法和样例：

例句

1. People live in small towns and in big cities.
   人们住在小城镇中或大城市里。
2. The surrounding small towns have been absorbed into the city.
   四周的小城镇已并入这座城市。