One should not run about aimlessly during an alert.

空袭警报期间不可到处乱跑。

Alert readers may have noticed the misprint in last week’s column.

细心读可能已经注意到上周专栏中印刷错误了。

The whole navy was placed on full alert.

整个海军都处于全面戒备状态。

The Shetland Sheepdog is a small, alert, rough-coated, longhaired working dog.

喜乐蒂牧羊犬是一种小、警惕、粗毛毛工作犬。

A nationwide alert went out for three escaped prisoners.

全国范围内发布了警报，搜捕三名监狱逃犯。

With Tirol before it, the motley battlewagon went on combat alert.

在泰洛星周围，各种战舰处于战斗警戒状态。

The voice of the caller alerted her.

呼唤声音使她警觉起来。

The patrol police on duty are on the alert against any possible disturbances.

"值班巡警处于戒备状态,随时准备应付任何可能发生骚乱。"

He is a man alert in problem.

他是个留意问题人。

A sparrow is very alert in its movements.

动非常机灵。

The policeman alerted me to the danger.

警察警告我有危险。

Drivers must be on the alert for traffic signals.

驾驶员必须密切注意交通信号。

The radio alert ed the citizens to prepare for the hurricane.

电台警告市民们作好预防暴风准备。

In our reading we should always be alert for idiomatic expressions.

我们在阅读过程中应经常注意惯用法。

He is an alert boy.

他是一个机警孩子。

He has an alert mind.

他很机灵。

He is invariably alert, usually enthusiastic, and always willing to tackle a new problem, usually with verve and irrepressibility.

他不变化地警觉,通常狂热,和总是乐意处理一个新问题,通常用气魄和镇压不住。

A new design of intelligent fire alert detecting system on multi detector signal fuzzification technic is presented in this paper.

提出一种基于模糊-神经网络多探测器信息模糊化智能火灾报警监测系统新方案。

He was the same thin, pleasant, alert, rather agreeable soul that he had been in the heyday of his clerkly prosperity.

他还是和做职员正得意全盛时期一样，是一个瘦削、高兴、灵活、和蔼可亲家伙。

Iraqi security forces were placed on high alert and American aircraft —unpiloted reconnaissance drones flying low, and fighter jets roaring high above —crossed the capital.

伊拉克安全部队处于高警戒状态，美国空军在首都上空穿梭，无人驾驶侦察机低空飞，战斗喷气机高空呼啸。