Competitors are entered by a National Olympic Committee (NOC) to represent their country of citizenship.

选手通过进入国家奥林匹克委员会(NOC)来确定其国籍。

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My friends and colleagues at the International Federations and national Olympic Committees, thank you for your close collaboration.

谢谢你们，我的同事们，国际体育联合会以及国家和地区奥委会的朋友们，感谢你们的协作与支持。

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The assistant commissioner, Chris Allison, the national Olympic security co-ordinator, said: "Our planning for security is intelligence led.

（伦敦警察署）助理指挥官、全国奥运安全协调人克里斯·艾利森（Chris Allison）说：“我们的安保计划是情报导向的。

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That talent has made him a two-time Most Valuable Player, as well as a reigning Olympic gold medalist as a member of the U.S national team that won in Beijing in 2008.

VOA: standard.2010.07.08

Team-outfitting sponsorships are negotiated individually by national Olympic committees and vary from country to country.

WSJ: Polo Ralph Lauren Lengthens Its Olympic Run

About 12% go to national Olympic committees, who then can sell to customers in their countries.

WSJ: Social Media

The peace-deal was apparently brokered by the chairman of Cameroon's National Olympic and Sports Committee, Colonel Kalkaba Malboum.

BBC: Milla and Hayatou bury the hatchet