Proto-Indo-European is considered the origin of many modern languages.

He is majoring in phonology at university.

I conducted an interview in a question-and-answer format.

Life is a series of ups and downs.

He does his work perfectly, dotting the i's and crossing the t's.

Let's cherish every encounter with the spirit of 'once in a lifetime'.

My friend lives with a hearing dog.

Canis Major is one of the brightest constellations in the winter night sky.

The capacity of this bottle is one koku.

His success is the result of his personal efforts.