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I can treat it by bleaching it with superoxol (30%h2o2).
我可以用30%的过氧化氢液来漂白牙齿。
youdao
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A rubber dam is needed to prevent the superoxol from burning the gingival.
需要做个橡皮障免得牙龈被烧伤了。
youdao
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A rubber dam is needed to prevent the superoxol from burning the gingival.
需要做个橡皮障免得牙龈被烧伤了。
youdao