It will be better to use whitening toothpastes.

这将更好地使用美白牙膏。

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And don't forget to think about whitening toothpastes or formulas with all natural ingredients.

而且你不会忘记去考虑洁白牙膏以及那些纯天然的配方。

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Whitening toothpastes will remove only surface stains, such as those caused by smoking, tea or coffee.

增白牙膏将可以去除牙齿表面色斑，比如由吸烟，喝茶或咖啡引起来的。

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Only a small number of whitening toothpastes are actually effective at removing stains, say researchers.

BBC: Whitening toothpastes 'don't work'

The BDA does not accredit a toothpaste for a whitening claim alone but accreditation can be given to toothpastes that demonstrate effective cleaning alongside dental health benefits.

BBC: Whitening toothpastes 'don't work'

Many toothpastes on the market claim to have 'whitening' properties - meaning that they may remove stains, rather than change the natural colour of the teeth.

BBC: Whitening toothpastes 'don't work'