perionychia

例句：

1. 1.The perionychia is a rare and precious material.
   这种材料是稀有且珍贵的。
2. 2. The perionychia was used in ancient times for its medicinal properties.
   这种材料在古代被用于其药用性质。
3. 3.The perionychia was discovered by accident during a scientific expedition.
   这种材料是在一次科学探险中偶然发现的。