ophicone

例句：

1. 1.The ophicone is a unique fossil found in the cave.
   石蛋是一种在洞穴中发现的独特化石。
2. 2.The ophicone is believed to have formed millions of years ago.
   石蛋被认为是数百万年前形成的。
3. 3. The ophicone has been studied for its potential use in medicine.
   石蛋已被研究用于其潜在的医疗用途。