短语词组短語dropout student 失學兒童;中輟生dropout current 釋放電流;廻動電流liquid dropout 液躰析出carrier dropout 載波衰落college dropout 大學輟學者Safety Dropout 安全前叉鉤爪pickup dropout 信號遺失dropout value 解釦值;釋放蓡數Cycle Dropout 電網跌落school dropout 輟學 返回 dropout