horny substance

例句：

1. 1. The scientist found a horny substance in the soil samples.
   科学家在土壤样本中发现了多毛物质。
2. 2.The animal was covered in horny substances that protected it from predators.
   这个动物身上覆盖着多毛物质，以保护自己免受捕食者的伤害。
3. 3. The researcher discovered a horny substance that could be used as an anti-aging agent.
   研究人员发现了一种多毛物质，可以作为抗衰老的药剂使用。