This method is very effective.

His smile was ephemeral, disappearing in an instant.

He is leading a religious life.

He started cleaning voluntarily.

A new approach is needed to solve this perpetual problem.

His house has a very modern design.

His secondary role greatly contributed to the success of the team.

He is working as a member of the International Criminal Police Organization.

The International Workers' Association is historically an important organization.

The United Nations Children's Fund is working to improve the lives of children around the world.