Recurrent aphthous ulcer (RAU) is the most prevalent oral mucosal disease in humans, estimated to affect 20% of the general population.是什么意思_Recurrent aphthous ulcer (RAU) is the most prevalent oral mucosal disease in humans, estimated to affect 20% of the general population.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句