黑眼圈是最常见的皮肤问题之一，通常是由于皮肤表层下微小的毛细血管出现渗血而造成的。

Dark circles are one of the most common skin problems, and are often caused by tiny capillaries that leak blood beneath the surface of the skin.

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目的观察镧奶、氟奶、钙奶再矿化液对人工龋表层下脱矿的再矿化作用及再矿化的形成机制。

Objective To evaluate the remineralization effect of milk with lanthanum, milk with fluoride and milk with calcium on artificial enamel caries.

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