短语词组短语circulation lag -time 循环滞后时间lag g time 迟延时间;时延Lag Compensation Time 滞后补偿时间lag of time 滞后时间counter lag -time 计数器滞后时间lag -time t 滞后时间tlag constant time 恒定落后process with lag dead time 大纯滞后过程 返回 lag time