Superfluidity is a part of physics, referring to the phenomenon where certain liquids flow without friction.

He is my new cohabitant.

The era of personal union was a form where one king ruled multiple countries.

I was walking along the Kamakura Highway.

He is attending school to obtain a motorcycle license.

The police believe that all these incidents were committed by the same criminal.

He is in the same position as his friends.

I enclosed the invoice in the envelope and sent it.

Her eyes were a beautiful amber color.

I recently met a middle school classmate of mine on the train.