But dentists said some of the methods can erode the enamel covering of the teeth making them appear darker rather than whiter.

但牙医提醒说，有些方法可能会损伤覆盖在牙齿上的牙釉质，反而让牙齿显得更黑。

youdao

It is worthwhile making an effort to keep you own teeth as long as possible.

以为了让自己的牙齿尽可能地长长而努力是值得的。

youdao

It is worthwhile making an effort to keep your own teeth as long as possible.

以为了让自己的牙齿尽可能地长长而努力是值得的。

youdao

But when Mr Kadyrov reaches out to pat it, the cub growls and bares its teeth, making sure the message is clear.

BBC: NEWS | Europe | Chechnya's gun-toting strongman

Some patients tell me that they are so connected that even before brushing their teeth or making coffee, they will roll over to check their phone- when a more appropriate choice may be to spend a few extra minutes in bed with their loved ones.

FORBES: Life "Unplugged" May Actually Make You Happier

Early forms of teeth whitening include using the herb elecampane (Inula helenium) to scrub the teeth and taking sage leaves and making a powder of them and salt.

BBC: Medieval teeth 'better than Baldrick's'