He was searching for something in the dark.

The aardvark is a nocturnal mammal that lives in Africa.

The 'dorou', a synonym for 'ādourufu', is a nocturnal mammal that lives in Africa.

Chen is my best friend.

The role of the Jijū was to handle the affairs of the imperial court.

My grandfather is from Czechoslovakia.

This town has strong self-government, and the residents are actively tackling local issues.

The meeting was forced to interrupt suddenly.

You should not interrupt his talk.

He said his ear hurts because of otitis media.