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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Novelty and challenge will make you happier, and money can pay for a trip to France, for a drawing class, for a mountain bike.

新颖和挑战会让人们更快乐，而钱能支付去法国旅游，参加绘画班，一辆山地自行车。

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They are also encouraging people to return to bike riding. It is a real challenge in a city with so many people and cars.

改善交通问题对于一个人多车多的城市来说真的是一项挑战。

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The Mark Webber Pure Tasmania Challenge is a 250km endurance event consisting of mountain bike riding, kayaking and trekking on the Australian island.

BBC: Webber targets return in February

The accident happened south-east of state capital Hobart on Saturday, while Webber was taking part in the Mark Webber Pure Tasmania Challenge - a 250km endurance event consisting of mountain bike riding, kayaking and trekking on the Australian island.

BBC: Webber breaks leg in bike crash

"The more you know your teammates, the less likely you are to take comments made in the midst of sleep deprivation personally, " says Sara Ballantyne, 38, a professional mountain-bike racer who helped lead Team Vail to victory in last year's Eco-Challenge in Morocco.

FORBES: Hypothermia for Fun and Profit