Fatigue damage is the main destroy mode for the machinery parts and engineering structures under alternate loading over a long period of time.

对于那些长期经受交变载荷作用的机械零件和工程构件，疲劳破坏是一种主要的破坏模式。

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The Liujiaxia hydropower station has operated for over 30 years and its releasing structures are seriously damaged due to long term erosion by high velocity silt laden flows.

刘家峡水电站运行已3 0多年，泄水建筑物长期经受高速水流挟带泥沙的磨蚀，破坏严重。

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Structures deteriorate in value over time and long-term construction costs have grown at or below inflation.

FORBES: Stepping Off The Southbound REITs