To challenge competition, challenge the pressure, to challenge themselves.

向竞争挑战，向压力挑战，更要向自己挑战。

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Streetball Syndicate to host the Ultimate Streetball Challenge competition, a nationwide grassroots competition to identify the best players in China.

这项基层挑战赛将在全国范围内展开，并挑选出中国最顶尖的街球选手。

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He loves sport and wants to challenge himself in triathlon—a sports competition in which people swim 4 kilometers, bike 180 kilometers and run 42 kilometers.

他热爱运动，并且想在铁人三项中挑战自己，而铁人三项是一项包含4公里游泳、180公里骑行和42公里跑步的运动比赛。

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The American Le Mans Series became the first racing event to use the protocols in its Green Challenge competition.

VOA: special.2009.11.03

Embrace, once a finalist in the Dell Social Innovation Challenge competition, has received ongoing acclaim for its low-cost infant incubator.

FORBES: Let's Stop Overlooking Systems Innovations

For Track 1, teams will develop technologies to be tested with the GFE platform during the second live Robotics Challenge competition to be held December 2014.

FORBES: DARPA's New Challenge: Increase Robotic Power Efficiency By 2,000 Percent

The Dragons failed to qualify for the Heineken Cup this season, but have impressed in Europe in the second tier Challenge Cup competition and are going well in the Magners League.

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