lag behind
常用搭配，表示落后于他人或进度。
She was tired and lagged behind the others.
她累了，落在了其他人后面。
落后；跟不上
lagging — present participle of lag
给…加保温层；用隔热材料包裹；减慢；松懈；未能跟上(步伐),落后。；用毛毡条或类似材料覆盖(例如管道)。；放松；减缓。
to fail to keep up; to fall behind
未能跟上(步伐),落后。
To fail to keep up (the pace), to fall behind.
用毛毡条或类似材料覆盖(例如管道)。
To cover (for example, pipes) with felt strips or similar material.
放松；减缓。
To slacken
一般现在时
The network often lags during peak hours.
网络在高峰时段经常卡顿。
一般过去时
The game lagged a lot yesterday.
昨天游戏卡顿得很厉害。
现在完成时
My computer has lagged since the update.
我的电脑从更新后就一直卡顿。
注意：规则动词，过去式和过去分词均为-ed形式。
He started to lag behind the group during the hike because of his injured ankle.
由于脚踝受伤，他在徒步中开始落后于队伍。
用法提示：这里“lag behind”表示在移动中落后于他人。
My computer tends to lag when I open too many browser tabs.
当我打开太多浏览器标签页时，我的电脑往往会卡顿。
用法提示：“lag”作为动词，表示计算机响应延迟。
The runner lagged significantly in the final lap and finished last.
这位跑者在最后一圈明显落后，最终排名垫底。
用法提示：“lagged”是过去式，表示在比赛中速度滞后。
常用搭配，表示落后于他人或进度。
She was tired and lagged behind the others.
她累了，落在了其他人后面。
表示在某个方面发展缓慢。
The project is lagging in development due to lack of funds.
由于缺乏资金，该项目在开发上滞后。
指给管道等加保温层。
They lagged the pipes with foam insulation.
他们用泡沫隔热材料包裹管道。
grammar · medium
易错句子He lags me in math.
正确表达He lags behind me in math.
动词lag表示'落后于'时，通常需要搭配介词behind才能接宾语，直接跟宾语是及物用法但较少见，且在此语境下不自然。
grammar · medium
易错句子He laged behind last year.
正确表达He lagged behind last year.
动词lag的过去式需要双写词尾g再加-ed，即lagged，而不是laged。
leg指人或动物的腿，形近发音相同，但意思完全不同
log拼写与lag相近，但意为记录或原木，无滞后含义
delay与lag都可表示延误，但delay更常用，强调主观推迟，lag强调落后于进度
落后
She refused to lag behind and worked hard to catch up.
她不甘落后，努力追赶。
落后于计划
The project started to lag behind schedule due to delays.
由于延误，项目开始落后于计划。
远远落后
In terms of education, some rural areas lag far behind urban centers.
在教育方面，一些农村地区远远落后于城市中心。
在发展上落后
The country's economy lags in development compared to its neighbors.
该国的经济与其邻国相比，在发展上落后。
给管道加保温层
To prevent freezing, we need to lag the pipes before winter.
为了防止结冰，我们必须在冬天前给管道加保温层。
常与lag一起描述时间上的滞后
表示处于滞后状态，与lag的落后含义相关
速度慢是导致滞后的常见原因
与lag对比，表示向前推进的概念
是lag的反向动作，追赶以消除滞后
落后
She has been ill and has lagged behind in her schoolwork.
她生病了，功课落下了。
时差反应
After flying from New York to Tokyo, I had terrible jet lag.
从纽约飞往东京后，我时差反应很严重。
文化滞后
The rapid technological change has created a cultural lag in many societies.
快速的技术变革在许多社会造成了文化滞后。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.