冰河学家对木卫二进行了多年的研究，试图搞清为什么它的表面伤痕累累，裂纹丛生。

Glaciologists have been studying the surface of Europa for many years, trying to work out what formed its scarred, fractured surface.

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采用扫描电镜进行断口分析，结果表明，零件内弯处外表面上的冲压伤痕是导致其早期疲劳断裂的主要原因。

The fracture surface was inspected by SEM. The results showed that the stamping damage on the surface around the inside bend was the main factor to cause the early fracture.

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验尸官表示，尸体表面没有任何外伤痕迹。

The coroner says the bodies show no signs of trauma.

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