角质鳞片

例句：

1. 1. The skin is covered with keratin scales that protect it from the elements.
   皮肤上覆盖着角质鳞片，保护它免受外界环境的影响。
2. 2. The scientist studied the structure of keratin scales in different species of animals.
   科学家研究了不同物种动物角质鳞片的结构。
3. 3. The keratin scales on the animal's skin are essential for its survival.
   动物皮肤上的角质鳞片对其生存至关重要。