My dream is to travel the world.

He decided to continue the job.

This world is full of innumerable changes, and something new is always happening.

This world continues to give rise to innumerable changes.

We have a responsibility to make this world a better place.

Esperanto is one of the most famous international auxiliary languages.

He set out on a journey in search of a new world.

He set out on a journey in search of the New World.

He is interested in the history of the Old World.

His grandfather fought in the Second World War.