Classically, overweight people underestimate the volume of food that they consume.一般来说，超重的人往往低估自己摄入食物的量。Physicians often underestimate retail prescription costs.医生往往低估零售处方的费用。Police often downgrade the seriousness of violence against women in the home.警方往往低估妇女所受家庭暴力的严重性。