皮骨骼

例句：

1. 1. The skin of theanimal is soft and smooth.
   动物的皮肤柔软光滑。
2. 2. The skeleton of the fishis strong and durable.
   鱼的骨骼强壮耐用。
3. 3. The skin of the human body iscovered with hair and sweat glands.
   人体的皮肤覆盖着毛发和汗腺。