Misalignment of teeth between the upper and lower jaws can grind down the teeth and cause problems in chewing. Elsewhere, it is a cosmetic problem.

下颚间的牙齿咬合不正会磨损牙齿并造成咀嚼问题，此外，也会造成外表美观的问题。

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Pipe smokers sometimes wear down the tips of their teeth where they grip their pipes.

抽烟斗的人用牙齿咬住烟斗，有时会把牙齿尖磨平。

《柯林斯英汉双解大词典》

Jamie nodded, keeping his gaze down, hoping Dad didn't notice the way he gritted his teeth when he heard his older brother's name.

吉米点点头，把头低了下去。 听到哥哥名字的时候他忍不住咬了咬牙，他可不希望被爸爸看到。

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As he once told the Washington Post: "When I came down I hurt my teeth in the net."

VOA: special.2010.07.05

And enough carbon dioxide emissions to spur the anti-coal crew to gnash their teeth all the way down to the gums.

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Liverpool Crown Court heard that the dog's teeth had been filed down and it did not break the skin on her leg, but she was left with a bruise.

BBC: NEWS | UK | England | Merseyside | Man jailed over bull dog attack

So, when some of the old man's teeth needed pulling, he sat down at the kitchen table, knocked back a belt of whiskey, and yanked them out himself with a pair of electrician's pliers.

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