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

VOA: special.2009.06.03

Instead of setting up a central bank in the United States as was done commonly in other countries the United States instead created twelve banks; they're the twelve Federal Reserve Banks.

与在很多国家设立中央银行,不同的是,在美国,建立了十二个银行；,它们是十二个联邦储备金银行。

耶鲁公开课 - 金融市场课程节选

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