A special event was held to celebrate his 100th birthday anniversary.

He was organizing documents using a shakudan.

The volume ratio of this engine is 10:1.

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.