The hard bone has dulled up the knife blade.

这硬骨头把刀刃弄钝了。

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Then let mine arm fall from my shoulder blade, and mine arm be broken from the bone.

情愿我的肩头从缺盆骨脱落，我的膀臂从羊矢骨折断。

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These include structures like a wide blade at the top of the hip bone that allows for more muscle attachments to help in balancing.

这些包括在髋骨顶部的宽骨片结构，允许更多的肌肉附着于其上，帮助平衡。

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