The main agreement of the system, the Antarctic Treaty, was signed by twelve countries in nineteen fifty-nine.

VOA: special.2009.06.03

The Obama administration plans to expand the program to twelve countries within the next two years.

VOA: special.2010.05.10

Researchers tested new household enamel paints from twelve countries in Africa, Asia and South America.

VOA: special.2009.08.31

On April fourth,nineteen forty-nine, twelve countries signed the North Atlantic Treaty in Washington.

VOA: special.2009.04.04

It was filmed over three years in twelve countries.

VOA: special.2009.03.25

This year, the twelve-day festival showed more than one hundred and thirty movies from thirty-four countries.

VOA: special.2009.03.25