The ecosystem of this lake is very fragile.

A regular polyhedron is a polyhedron where all faces are the same shape.

He told a sexual joke and made everyone laugh.

He works in the IT sector.

His music is globally famous.

He always makes rational decisions.

The global economic crisis had a serious impact on the economies of many countries.

This company has world-leading technological capabilities.

I went on a trip by Sekifune.

The charm of his novel is its unique worldview.