It's made of keratin,犀牛角由角蛋白構成
make of以 ... 為材料制作
I do not think we have any vase make of bamboo.
我想我們沒有竹制的花瓶。
It's make of pure wool, very soft.
這是純羊毛的,非常軟。
the same substance as hair and nail,與頭發,指甲的成分一致
the same as與 ... 同樣的
She felt just the same as he did.
她和他的感受相同。
Twins look the same as each other.
雙胞胎看上去長得一樣。