Increase the amount of time a runner is able to spend training without accumulating fatigue or getting injured.

增加跑步者可以不受积累疲劳和伤痛困扰的训练时间

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Let's say you have been a runner for some time and you have been running daily

假设你是个赛跑手，你每天都会跑步。

That's why 课堂 - SpeakingMax英语口语达人

"(De La Rosa) didn't really give us any easy RBI opportunities, " Wells said, noting there were two outs each time the Yankees got a runner to third.

WSJ: No support for Kuroda, Yankees lose 2-0 to Rockies

Mr. Cuomo, who was elected attorney general in 2006 and announced his gubernatorial candidacy in May, has enjoyed a front-runner status for some time but is facing a tougher-than-expected challenge from the Republican nominee, Carl Paladino, a tea-party backed developer from Buffalo.

WSJ: Hevesi Said to Be Close to a Guilty Plea

Trying to win the Sony Open must feel that way to Sharapova, a four-time runner-up.

NPR: Sharapova Beats Errani In Key Biscayne Quarters