melanin造句
The production of
melanin in the skin is stimulated by exposure to the sun.
皮肤暴露在阳光下就很容易生成黑色素。
Freckles are simply concentrations of
melanin.
雀斑不过是高浓度的黑色素.
Promote the blood circulation, and accelerate the
melanin's decomposition and absorption.
促进血液循环, 加速黑色素的分解与吸收.