短语词组短语dropout student 失学儿童;中辍生dropout current 释放电流;回动电流liquid dropout 液体析出carrier dropout 载波衰落college dropout 大学辍学者Safety Dropout 安全前叉钩爪pickup dropout 信号遗失dropout value 解扣值;释放参数Cycle Dropout 电网跌落school dropout 辍学 返回 dropout