pteralium

例句：

1. 1.The pteralium was a symbol of the ancient Greeks' belief in the gods.
   这个飞翼是古希腊人民信仰神的象征。
2. 2. The pteralium is considered to be one of the most beautiful and intricate designs in the world.
   这个飞翼被认为是世界上最美丽和复杂的设计之一。
3. 3.The pteralium has been used for centuries as a symbol of freedom and democracy.
   这个飞翼被使用了几个世纪，作为自由和民主的象征。