melanoderm

例句：

1. 1. The melanoderm is a protective layer that covers the animal's body.
   光皮是覆盖动物身体的保护层。
2. 2. The melanoderm is made up of calcium carbonate and other minerals.
   光皮由碳酸钙和其他矿物质组成。
3. 3. The melanoderm is important for protecting the animal from predators.
   光皮对于保护动物免受捕食者的伤害至关重要。