To whiten teeth that are stained at a deeper level, talk with your dentist.

如果染色比较深了想洁白，就和你的牙医谈谈吧。

youdao

Though heavily advertised, these only partially whiten teeth and don't provide a complete remedy.

虽然这类美白牙膏的广告很多，但它们通常只具备部分的美白功效而没有提供彻底的美白方案。

youdao

Some people still prefer the age-old home remedy of baking soda and a toothbrush to gently whiten teeth at home.

有些人还是喜欢古老的家庭自备方法来增白牙齿，如用小苏打轻轻刷牙美白牙齿。

youdao

Apparently, this new filter adds the ability to whiten teeth, widen eyes, soften skin and even overlay a rainy day window or magazine-like layouts to shots.

ENGADGET

On the WX300 and TX30 cameras, Beauty Effect mode lets users automatically re-touch photos after shooting to remove skin blemishes, widen eyes and whiten teeth as needed.

ENGADGET: Sony brings Cyber-shot HX300, WX300 and TX30 to the US with fast autofocus