Heavy hydrogen is one of the isotopes of hydrogen.

He perfectly memorized the fifty sounds.

Because of his indecisive nature, he always takes a long time to choose a menu at a restaurant.

This plastic is made from a special polymer.

He was playing video games all day.

He was surrounded by his family when he was on his deathbed.

He told me the whole story of the incident.

It's my habit to go to the Jusan Mairi every year.

He has been living in this town for several decades.

What is the length and breadth of this room?