Objective: The treatment protocol was designed to assess the efficacy of intracoronal laser teeth bleaching in the treatment of nonvital teeth darkening.是什么意思_Objective: The treatment protocol was designed to assess the efficacy of intracoronal laser teeth bleaching in the treatment of nonvital teeth darkening.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句