xanthatin

例句：

1. 1.The xanthatin is a rare and valuable species of fish.
   这种鱼是一种稀有且珍贵的鱼类。
2. 2. The xanthatin plays an important role in the ecosystem.
   这种鱼在生态系统中扮演着重要的角色。
3. 3.The xanthatin has been hunted to the brink of extinction due to overfishing.
   由于过度捕捞，这种鱼濒临灭绝。