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。
Wang Na was born with no upper jaw bone or teeth, making eating and speaking very difficult.
王娜天生就没有上颌骨和牙齿，这使得她吃东西和讲话都很吃力。
The faster the pulse repetition rate, the wider the spacing between the teeth, making each individual tooth easier to identify.
脉冲重复率越高，齿间距越大，各个齿之间也越容易分辨。
The faster the pulse repetition rate, the wider the spacing between the teeth, making each individual tooth easier to identify.
脉冲重复率越高，齿间距越大，各个齿之间也越容易分辨。
应用推荐