He is struggling with the spelling pronunciation of English.

Learning about the nasal sound rule in Japanese is very important for understanding pronunciation.

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.