Pig racing is a sport in which juvenile pigs race around a small enclosed dirt, fake grass or gravel track.

猪赛跑指的是幼年的小猪在圈定的泥地，人造草地，或塑胶跑道上赛跑。

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Purple grass yesterday come back once recommended a benefit trap a hall preoccupy, she wanted temporarily depart, so be lacking a track and shadow early in the morn today.

紫草昨日回来就曾提过济困堂有事，她要暂时离开，所以今日一早就不见了踪影。

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The railway stations are in ruins, the track overgrown with weeds and grass.

铁路火车站都已成为废墟，轨道长满了超过其高度的杂草。

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On top of this base sits the open air stadium with its artificial running track and grass pitch laid above the concrete roof of the car park.

BBC: Stade Louis II

Returning to the grass track of his youth, he stepped in a hole and injured his hip, though it has recovered.

WSJ: Menu

Roger Black, who won silver in the 400 meters at the Atlanta Games in 1996, was part of a coterie of top-notch British runners who trained on a grass track at the University of Southampton.

WSJ: Menu