The fatigue fractography consists of several different zones, including fatigue crack initiation, slow, fast propagation and final fracture.

疲劳断口上存在典型的疲劳裂纹萌生区、缓慢扩展区、 快速扩展区和最后瞬断区。

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During fracture propagation driven by detonation gas in oil well, dynamic response of crack surface under the gas pressure results in fast fracturing.

油井爆生气体对岩石劈裂作用过程，是裂缝面对动态荷载响应并使其发生动态扩展的过程。

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As an effective investigation technique, common-offset SH reflection method can be carried out fast in the field and easy to detect caves and underground karst fracture zones.

作为一种有效的探查技术，等偏移横波(SH)反射法具有探测迅速，易于探测土洞、地下岩溶裂隙带的特点。

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Elderly women who lose that much height that fast have a 21% higher risk of hip fracture, said the study, which examined data from over 3, 000 adults from the Framingham Heart Study.

WSJ: Health Journal: Yes, You Are Getting Shorter