Finally, individual errors in pitch track are corrected by a smoothing method, in which a searching and tentative method together with a judge mechanism of adding or eliminating pitch period is used.

最后，采用搜索试探的平滑算法，并加入一个增加或者消除周期的判断机制，对基音轨迹曲线中出现的个别错误进行纠正。

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The Velodrome originally featured an athletics/cycling track and a football pitch.

维洛德罗姆球场最初可用作田径、自行车和足球比赛。

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But the clothes are not only worn on the athletics track or the football pitch.

但这些服装不只是出现在田径跑道或足球场上。

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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

The running track which bordered the pitch also served as a reminder of the worst aspects of Wembley.

BBC: England fans suffer in ignorance

Visible below, in the valley, was a running track, a soccer pitch, and a giant dirt lot, where you could hear the shouts and screams of children at play.

NEWYORKER: Master of Play