As the night grows late, the city becomes quiet.

He was lost in deep contemplation.

He pondered deeply and found a solution to the problem.

His eyes are a deep blue.

His room was so unclean that I didn't want to clean it.

Due to the economic downturn, many companies went bankrupt.

Due to the depressed business climate, many companies are going bankrupt.

The prefectural police are proceeding with the investigation of the incident.

The discussion at the prefectural assembly was lively, and important issues about local autonomy were raised.

My father and older brother are very strict.