One should not run about aimlessly during an alert.

袭警报期间不可处乱跑。

A nationwide alert went out for three escaped prisoners.

全范围内发布了警报，搜捕三名监狱逃犯。

The sirens are calling the men to assemble.

警报声在召令士兵集合。

Alarmed at the first sound, we hit the dirt.

第一声警报一响我们就迅速卧倒。

The man on duty rang an alarm.

值班员发出警报。

A professionally installed alarm will cost from about ￡500.

请专业人员安装的警报器要花费至少500 英镑。

The emergency services were put on standby after a bomb warning.

接炸弹警报后，各紧急救助部门进入待命状态。

On 2 April 1916 air-raid warnings sounded throughout Edinburgh.

1916 年4 月2 日袭警报响彻了整个爱丁堡。

For where a man's intentions are published, it is an alarum, to call up all that are against them.

因为一个人底意向若是公开那就等于一声唤起一切敌人的警报。

They heard the fire alarm.

他们听了火警警报。

North American Aerospace Defense Command (NORAD) - a binational command involving the United States and Canada which provides warning of missile and air attack against both of its member...

北美航防御指挥部-美拿大的联合指挥部，提供导弹发射袭的警报，保卫北美领，并提供中防御。