pterotic

例句：

1. 1. The pterotic bone is the most important part ofthe skeleton.
   翼骨是骨骼中最重要的部分。
2. 2. The pterotic wing isa unique feature of birds.
   翼鸟的翼是一个独特的特征。
3. 3. The pterotic boneis responsible for supporting the weight of thebird's body.
   翼骨负责支撑鸟类身体的重量。