在前一种中，左右型对称骨片的存在证实该动物两侧对称。
Left right sclerite pairs are found which proves a bilaterally symmetrical body of the animal.
蝙蝠的翼是演化过程中由前肢演化而来。除拇指外，前肢各指极度伸长，有一片飞膜从前臂、上臂向下与体侧相连直至下肢的踝部。
Their wings are evolutionary modification of the forelimbs, with greatly elongated fingers joined by a membrane that extends down the side of the body.
目的探讨足印图三线法、比值法和负重侧位X线片数据测量在脑性瘫痪（脑瘫）患儿足外翻康复评估中的临床意义。
Objective To explore the clinical significance of the footprints and lateral X-rays in weight loading in evaluating the rehabilitation of talipes valgus in the children with cerebral palsy.
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