Nail Polish 指甲油

Nail polish may just be the Twinkie of the beauty world: It won't go bad from bacteria. Eventually though, lacquer will dry out and become thick and clumpy, with the pigments settling along the bottom of the bottle. Shake it, and if the formula remains separated, it's done-zo。

Ttips：指甲油不会滋生细菌，但是时间一长会干。如果摇晃之后，沉淀和油状还是分离态，就变质了。