已经灭绝了6500万年之久的菊石是一种带有多室螺旋状外壳的海洋头足类动物，其小室之间的阻隔即缝合线就是一种复杂的分形曲线。
Extinct for 65 million years, ammonites were Marine cephalopods that built chambered spiral shells. The walls between these Chambers, called sutures, were complex fractal curves.
目的总结改进带腓肠神经营养血管远端蒂逆行岛状皮瓣修复足踝部皮肤缺损的临床效果。
Objective To report the clinical result of the improved island skin flap with distally-based sural nerve nutrient vessels in repairing skin defect in the heel, ankle or foot.
目的探讨足外侧筋膜岛状皮瓣修复足跟缺损的治疗效果。
Objective To research the result of defect repairing on heel with island shaped fascial flap of lateral foot.
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