短语词组短語circulation lag -time 循環滯後時間lag g time 遲延時間;時延Lag Compensation Time 滯後補償時間lag of time 滯後時間counter lag -time 計數器滯後時間lag -time t 滯後時間tlag constant time 恒定落後process with lag dead time 大純滯後過程 返回 lag time