• If you have coffee-stained teeth, a tooth-bleaching kit can help.

    如果咖啡染色斑可用牙齿漂白试剂盒

    youdao

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

    如果染色比较洁白,就和你的牙医谈谈吧。

    youdao

  • He had smoked for so many years that his teeth were permanently stained yellow.

    那么多年烟,牙齿都被永久地熏黄了。

    youdao

  • He had smoked for so many years that his teeth were permanently stained yellow.

    那么多年烟,牙齿都被永久地熏黄了。

    youdao

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