The potential energy of this ball is proportional to its height.

His usual location is the seat at the very back of the library.

He believes in urban myths.

This urban infrastructure, especially the development of highways, contributes greatly to economic development.

Kyoto has a sister city relationship with Boston.

The landscape of the countryside has changed due to the progress of urbanization.

This area is rapidly urbanizing.

He was born and raised in a megalopolis.

We moved to a newly developed satellite town.

Singapore is a prosperous city state.