Ideal for acne sufferers . will not darken pigments of skin cells 不会产生色素沉淀，令皮肤质素变坏。
2.
The spots arise when groups of cells begin producing pigment in response to repeated stress or irritation of the skin 这些黑斑在大量细胞由于反复压力或皮肤受到刺激产生色素时出现。
3.
The most serious skin cancer is melanoma . it begins in the cells that produce skin color . it can develop anywhere . they are usually found on back and shoulders 最严重的是黑色素瘤，它开始于皮肤中产生色素的那些细胞，黑色素瘤可以在身体的任何部位产生，通常在背部和肩部。
