Complete all "Speed Runner" challenges.

完成所有“速跑者”挑战。

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If a distance runner practices speed work for the whole practice every day, he will not improve his endurance.

如果一名中长跑选手每天只进行速度练习，那么他将不能提高自己的耐力。

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Right now we are working on a performance increase that will more than triple the speed of testing when working with a large number of tests by removing some inefficiency in the test runner.

现在我们正在提升其性能，通过移除测试运行器中的一些低效代码，在对大项目进行测试的时候，其速度可以提高三倍以上。

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And the outgoing man has to match up his outgoing speed with the incoming speed of the runner with the baton.

NPR: Anchor-Leg Strength May Be Hurting Relay Handoffs

The bell goes with me in second place, that magical ting-a-ling that always draws a roar from the crowd and puts speed in the stride of every runner.

BBC: Me, my race and Haile

Granderson, who will be 32 by opening day, has been a fast straight-line runner who uses his speed to chase down balls, but who sometimes makes imperfect reads off the bat.

WSJ: In the Center of Yankee Change