lag

The children always lag behind when we go for a walk.

我们出去散步时，孩子们总是落在后面。

Don't lag behind the group.

不要落在队伍后面。

She lagged behind in her studies.

她的学习落后了。

The slow runner lagged at the back.

跑得慢的人落在了后面。

Our sales lagged behind last year's.

我们的销售落后于去年。

There was a long lag in forwarding mail to me.

寄给我们的邮件耽搁了很久才送到。

There is a time lag between order and delivery.

订货和送货之间有时间差。

The lag in response was too long.

响应时间太长了。

We need to reduce the lag in production.

我们需要减少生产上的延迟。

There was a short lag before he answered.

他停顿了一小会儿才回答。