Rail track geometric irregularities are the concrete embodiment of track structure deterioration, and give an expression to the comprehensive performance of track members.

轨道几何平顺状态是轨道结构部件综合性能的表现，直接反映了轨道质量状态的优劣。

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Gold believes the deterioration of the specialist athletics track at Crystal Palace provides an example that an athletics stadium, in itself, is unsustainable.

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