尽管局部用维甲酸类可使角质化皮肤恢复正常，抑制粉刺形成，并能改善其他药物的穿透作用，但他们没有抗菌作用。
Although topical retinoids are effective in normalizing keratinization, preventing comedone formation, and improving penetration of other topical agents, they do not possess antimicrobial properties.
经常敷用这种混合物会减少粉刺、痤疮的形成，并会帮助祛除黑头自然的方法。
Regular application of this mixture, will reduce the formation of pimples and acne and will help remove black heads the natural way.
粉刺是由于皮脂和死皮细胞堆积在毛囊中所形成的。
Acne results from the buildup of sebum and dead skin cells in hair follicles.
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