答：弱质故障（weakness fault）就是施加的应力未超出产品允许范围，由于产品本身薄弱引起的故障。
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weakness of fault materials 断层带物质弱化
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Yet the opposition's weakness is largely its own fault.
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Its deadliness was linked, among other things, to the weakness of buildings, the depth of the quake, the density of population, the fault and soil types, and the intensity of the shaking.
ECONOMIST: Why the Kashmir earthquake happened and what might be done
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