He opened the doorway and entered the house.

When you pass through this gate, a new world is spreading.

I went to see the Arc de Triomphe in Paris.

He is deeply studying about the classification of superphylum in his biological research.

A baby's fontanelle naturally closes a few months after birth.

A baby's fontanelle closes a few months after birth.

This organism is classified into the subphylum.

His incisors are very sharp.

There is a large sluice gate in this river.

This book explains in detail how to use the 'Kyūjitai form of 声門' in old Japanese.