The inside of the bird nest was a sport field covered with plastic racetracks. The center of the sport field was a green lawn.

鸟巢的内部是运动场，铺着塑胶跑道，中心是绿油油的草坪。

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Some people prefer to watch a sport game from the audience seat, others prefer to be in the sport field and compete with others.

一些人喜欢在观众席观看体育比赛。一些人则喜欢在赛场上与他人竞争。

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The researches of coping in the sport field mainly involve the sources of stress, coping ways and influencing factors of the athletes.

运动领域应对的研究主要涉及到运动员的压力源、应对方式及其影响因素、应对方式量表等方面。

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The effects of the Boston Marathon bombings are rippling across track and field as the sport kicks off its spring season.

WSJ: Track Events Weigh Security After Boston Marathon Bombings

Elephant polo, played primarily in countries like India, Nepal and Thailand, follows similar rules as the traditional sport, though the pitch (or field) is a bit smaller, players wield longer mallets made from cane or bamboo and two people ride the elephant: the player and the mahout who steers the animal.

BBC: Polo-playing elephants in Nepal

Even the premiere Olympic sport, track and field, will appear here on television hours after the results are known.

NPR: Mr. Phelps' Mission: Saving U.S. At The Olympics