短語詞組短語retrogradation behavior 退化行爲coastline retrogradation 岸線蝕退rice retrogradation 大米老化its retrogradation 凝沉性retrogradation properties 老化特性low retrogradation 抗凝沉性quality retrogradation 質量退化Retrogradation Cholecystectomy 逆行膽囊切除術retrogradation type 退積型 返回 retrogradation