That's about as fast as a racing bicycle.

这几乎和竞赛用自行车一样快。

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It has all kinds of styles such as children's bicycles, field bicycles, racing bicycle and so on.

它有各种各样的款式，如儿童自行车、野地自行车、赛车等。

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He battered up his racing bicycle in the race.

他在自行车赛中把赛车撞坏了。

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Broken collarbones and road rash are the most frequent injuries in bicycle racing but there is growing concern about concussions.

WSJ: Cycling's Occupational Hazard

Florida's state bicycle racing association hired Usada last year to initiate testing at its races, after local racers began complaining that older riders were getting faster rather than slower with age.

WSJ: Cycling's Minor Leagues of Doping

And I remember how a few months after that I would watch him on a bicycle, racing with his fellow wounded warriors on a sparkling spring day, inspiring other heroes who had just begun the hard path he had traveled -- he gives me hope.

WHITEHOUSE: The White House