The sport's rules require that a race walker's knees stay straight through most of the leg swing and one foot remain in contact with the ground at all times.

这项运动的规则要求竞走运动员的膝盖在大部分的腿部摆动过程中保持笔直，一只脚始终与地面保持接触。

youdao

The rules of the race lay out certain regulations which each musher must abide by.

比赛规则制定了特定的管理办法，每位驾驶者都必须遵守。

youdao

It's like the race organizers are changing the game rules in the middle of the season.

这就像是比赛主办单位在赛季中期更改了游戏规则。

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States that want to take part in the Race to the Top cannot have rules that bar performance-based pay for teachers.

VOA: special.2009.07.30

However, the jury found Wild Oats had received acknowledgment from Hobart radio, which did satisfy race rules.

CNN: STORY HIGHLIGHTS

Because Armstrong has been accused of knowingly violating race rules and the terms of his sponsorship contracts by doping throughout his seven Tour victories, it is difficult to envision the IRS concluding that Armstrong could have believed he had an unrestricted right to his bonus money.

FORBES: Section 1341, In General

That race will debut a new set of rules by the race organizers, the Automobile Club de l'Ouest, and it will see many of the world's great car makers competing with advanced hybrid prototype sports cars.

WSJ: Porsche GT3 R Hybrid; 2012 Porsche 911 S: Porsche Blasts Hybrids Into a New Stratosphere | Rumble Seat by Dan Neil