But counting the world's third largest population -- about three hundred nine million by current estimates -- is no easy job.

VOA: special.2010.03.20

Most advanced countries of the world today have a corporate profits tax rate for large corporations of about a third.

现在世界上大多数的发达国家,都征收企业所得税,对大企业来说税率大概是三分之一

耶鲁公开课 - 金融市场课程节选

that can be distributed to people in maybe Third World countries or

然后分发给第三世界国家的人，

MIT赛艇选手 - SpeakingMax英语口语达人

It is best that the West look at the Third World from the Third World perspective.

CNN: ASIANOW - Asiaweek | Letters & Comment

Caras reflects the division that exists within Brazil - a country that is both First World and Third World.

BBC: NEWS | Entertainment | Brazil's bland and beautiful

Its an issue that involves both first world countries and third world countries.

BBC: NEWS | In Depth | 2003 | World Forum | Water | Global village voices: Water