pterin

例句：

1. 1. The pterin is a rare and valuable material used in the manufacture of high-tech devices.
   飞鱼鳞是一种稀有且珍贵的材料，用于制造高科技设备。
2. 2.The pterin has been found to have unique properties that make it suitable for use in various applications.
   研究发现，飞鱼鳞具有独特的性质，适用于各种应用。
3. 3.The pterin was discovered during a scientific expedition to the deep sea, where it was believed to be a key component of ancient marine life.
   在一次深海科学考察中发现了飞鱼鳞，被认为是古代海洋生物的关键成分。