This regular tetrahedron is composed of equilateral triangles on all sides.

Ousa goes for a walk with her dog every morning.

The volcano erupted.

This drama will continue next week as well.

His room is decorated with colorful abstract paintings.

His sword pierced the enemy's defense.

He is working round the clock.

I use a tram for commuting every day.

Shun winked his eyes.

Chlorofluoromethane is one of the substances that contribute to the destruction of the ozone layer.