Objective To observe the clinical efficacy of concentrated cod-liver oil gutta and erythromycin in treating children with aphthous ulcer.是什么意思_Objective To observe the clinical efficacy of concentrated cod-liver oil gutta and erythromycin in treating children with aphthous ulcer.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句