China is one of the largest countries in the world.

中国时世界上最大的的国家之一。

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Brazilis one of the largest countries in the world.

巴西是世界上最大的国家之一。

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China a is one of the largest countries in the world.

中国是世界上最大的国家之一。

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The world's largest malaria vaccine study began last year in seven African countries.

VOA: special.2010.04.20

"If iPad Nation were a country, it would be in the top 10 largest countries in the world with more than 100 million citizens, " McQuivey said.

CNN: Doug Gross,

On his visit to Algiers on Wednesday, David Cameron will stress the strategic importance of one of the largest countries in the world in what he has called "the generational struggle" against al-Qaeda in North Africa.

BBC: What is the UK doing in North Africa?

Political stability, a young well educated population and the rise of Asia as an economic dynamo have created a boom in one of the largest Muslim countries in the world, which also sits on the fault line between two continents.

BBC: Could airport hub capacity see UK lose out to rivals?