The hard bone has dulled up the knife blade.
这硬骨头把刀刃弄钝了。
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。
Unlike that benignly daft creature, this real-life surgeonfish in Indonesia carries a sharp retractable blade of bone near the base of its tail.
跟那只疯疯癫癫的亲切生物不同，印度尼西亚的这只正牌医生鱼在尾巴附近有一片能伸缩的锋利骨片。
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