电动及声波牙刷在清除牙菌斑和牙表面污渍方面，可能优于传统牙刷。
Both electric and sonic toothbrushes may be superior to traditional toothbrushes in removing plaque and surface stains on teeth.
电动及声波牙刷在清除牙菌斑和牙表面污渍方面，可能优于传统牙刷。
Both electric and sonic toothbrushes may be superior to traditional toothbrushes in removing plaque and surface stains on teeth.
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