Take a very close look at a worn surface under direct sunlight.

在阳光直射下仔细地观察一个磨损的表面。

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By using SEM to examine the worn surface morphology, the wear mechanisms of these coatings were explored.

通过用扫描电镜对磨损表面形貌进行的观察分析，探讨了复合涂料涂层的磨损机理。

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Microscopy showed that the worn surface of track shoe is a combined result of multiple types of wear mechanism.

微观分析指出：履带板表面的磨损是多种类型磨损机理的综合结果。

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There was no mechanical defect to explain the tragedy, but the inquest heard that the road surface was worn and was resurfaced a few weeks after the accident.

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"At three of these locations our investigations concluded that the noise should be mitigated through the installation of low noise surfacing materials when the existing surface is worn out, in accordance with our maintenance policy, " said an agency spokesperson.

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There's still some hard-court season left, and Nadal has been grousing about it, feeling the surface agitates his worn knees.

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