Heavy hydrogen is one of the isotopes of hydrogen.

He was playing video games all day.

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

This plastic is made from a special polymer.

He perfectly memorized the fifty sounds.

He told me the whole story of the incident.

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

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

Crux is one of the constellations in the southern hemisphere.

He gripped the control stick and piloted the plane.