In contrast, the KEY III is suitable for the treatment of soft tissue and hard tissue (enamel and bone), and in periodontology for gentle calculus removal.是什么意思_In contrast, the KEY III is suitable for the treatment of soft tissue and hard tissue (enamel and bone), and in periodontology for gentle calculus removal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句