Question

lag 【lag】v.慢慢地瞳；落后The child lagged behind others because he was very tired.这个小孩困为非常疲倦而落后于其他小孩。

Accepted Answer

[læɡ] 
laghang (back) or fall (behind) in movement, progress, development, etc.
When you can't keep up with your fellow marathon runners, you can say that you lag behind them.
The word lag describes a kind of slowness or delay. As a noun, it means a slowing: "The coach was disappointed by the lag in her swimmers' best times that day." When you lag behind someone, you fall back or don't measure up. A student who struggles with math, for example, might say that his grades lag behind his best friend's. In the 1550s, lag meant "last person."
All forms of 'lag' will appear on average once every 1109 pages.laglaggerlagging

Front	lag
Pron	[læɡ]
Back	【lag】 v.慢慢地瞳；落后 The child lagged behind others because he was very tired. 这个小孩困为非常疲倦而落后于其他小孩。
Vocab	laghang (back) or fall (behind) in movement, progress, development, etc. When you can't keep up with your fellow marathon runners, you can say that you lag behind them. The word lag describes a kind of slowness or delay. As a noun, it means a slowing: "The coach was disappointed by the lag in her swimmers' best times that day." When you lag behind someone, you fall back or don't measure up. A student who struggles with math, for example, might say that his grades lag behind his best friend's. In the 1550s, lag meant "last person." All forms of 'lag' will appear on average once every 1109 pages. lag lagger lagging

Lag Fall Læɡ V.慢慢地瞳；落后 Child Lagged Tired 这个小孩困为非常疲倦而落后于其他小孩