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

We are implementing a social distancing strategy to prevent the spread of the new coronavirus.

He was lying face-up, looking at the stars.

Listening to music is really enjoyable.

I was born and raised in Kakamigahara City.

Three countries formed an alliance.

This mutetrahedron has a very unusual shape.

This is a model of a mutetrahedron.