详细解释:【医】 食物摄取, 摄食
例句：
An eating disorder in which one alternates between abnormal craving for and aversion to food. It is characterized by episodes of excessive food intake followed by periods of fasting and self-induced vomiting or diarrhea.饮食失常一种饮食无序，在这种情况下，一个人常常处于不正常的贪食和厌食的交替状态，特点是偶尔的暴饮暴食继而又很快的引起呕吐或腹泻