The United Nations Environment Programme is providing solutions to global environmental problems.

He is world-famous as a comparative linguist.

He got a four of a kind in poker.

This painting is a masterpiece from the Renaissance era.

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.

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.