If your tooth enamel is porous, the colors contained in beverages easily absorb into it and your teeth lose their natural whiteness.
如果你的牙釉质不坚固，饮料的颜色就很容易渗入牙釉质，牙齿就失去了自然的洁白。
If your tooth enamel is porous, the colors contained in beverages easily absorb into it and your teeth lose their natural whiteness.
如果你的牙釉质不坚固，饮料的颜色就很容易渗入牙釉质，牙齿就失去了自然的洁白。
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