I deeply apologized to him.

This dress is made of batiste.

Nitrogen dioxide is a cause of air pollution.

She sent him a kiss.

The first time I kissed him was in a park under the moonlight.

Styrene is an important component for the manufacture of plastics.

He is a very famous artist.

Day after day, he continued to strive to solve the problem.

He tried to solve the problem all day long.

Kanichi is my best friend.