In our club, we conducted a secret ballot to choose a new leader.

His music has a melancholic atmosphere.

Fluoromethane plays an important role in chemical reactions.

Chloromethane is often used in organic chemistry experiments.

Difluoromethane is widely used as a refrigerant.

There are three boys named Akira in the class.

He rose in the world through hard work and talent.

He always plays minor parts in the theater company.

The Hachijō bulbul is chirping outside the window.

It is important to learn about the prevention and treatment of the human immunodeficiency virus.