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

I enjoyed the beautiful rural scenery while walking along the ridge.

The ship capsized.

He prostrated before the king to show respect.

This mutetrahedron plays a very important role in the world of mathematics.

Shigeru grows vegetables in the field.

This is a model of a mutetrahedron.

This mutetrahedron has a very unusual shape.