- discolored tooth
- 变色: change colour; discolour
- 牙: tooth
- 变色牙脱色: bleaching of discolored tooth
- 变色: 1.(改变颜色) change colour; discolour 风云变色。 the current political situation is changeable. 这种墨水不会变色。 this ink will not change colour. 脸不变色心不跳。 one's face does not change colour, nor does one's heart beat faster -- without a trace of fear.2.(改变脸色发怒) change one's countenance; become angry 勃然变色 suddenly change one's countenance3.[生理学] (皮肤、毛发等变色) allochromasia; allochroism; discolouring; metachromatism; alteration; floating; 变色龙 chameleon
- 绿色牙杆菌: bacillus dentalis viridans
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