剑桥词典a rare eating disorder in which someone, especially a child , swallows food , brings it back up from the stomach , and then chews it and swallows it again （罕見）反芻症 Merycism is found mainly in young children and people with mental disabilities . 反芻症主要在兒童或有精神疾病的人中發生。 返回 merycism