警戒状态

to alert───提醒

air alert───空袭警报；空中警戒

ground alert───n.进入戒备状态之信号；戒备状态

on camera───在电影或电视摄影机的摄影范围内；出现在电视上

on the alert───提防；警戒著；随时准备著

red alert───紧急警报，红色警报；应急状况

alert───adj.警惕的，警觉的；机警的，机敏的；充分意识到的；v.使警觉，警告；使意识到；n.警戒，警惕；警报；警戒期；（电子设备的）提示信号；n.(Alert)（美、德、俄、西、印）阿莱尔特（人名）

in alt───高音地

on at───在

Soldiers and police have been put on alert.───士兵和警方都已进入警戒状态。

This will leave the earth vulnerable, so we're still on alert.───这会让地球容易被攻击, 所以我们仍然处于警戒状态.

Bombers were put on alert during the crisis.───危机时刻,轰炸机处于警戒状态.

Emergency services were put on alert.───应急服务时刻准备着.

On alert the ear should never droop, bend, or crease.───警惕时,耳朵决不下垂 、 弯曲 、 或折叠.

and southern Indian's Madras near Mumbai, have also been put on alert.───和孟买附近的南印度的马德拉斯也已经进入戒备状态。

Please be on alert against strangers in your premises.───提高警惕,尤其注意租区内的陌生人.

HK on alert after typhoon sweeps through Philippines.───香港做好“迎接”台风准备.

Some 7,000 police will be on alert.───7000警察将在戒备.

We have informed the airport to be on alert as the ash is quite high this time.───我们已经通知机场时刻警惕，因为火山灰现在已经上升到高空。

Several Southern California beaches were put on alert, including Huntington beach and Laguna beach.───南加州的几个海滩，包括亨廷顿海滩和拉古纳海滩，已进入警戒状态。

I think, again, it puts people on alert all the time.───我想必定是周而复始的, 它使人们一直处于高度紧张中.

Although they may appear dead, they sometimes spring up to attack, so always be on alert.───它们也许看上去已经死去, 但有时它们也会奋起战斗, 时刻处于警戒状态.

Security forces were on alert against a possible terrorist attack.

The army was put on alert as the peace talks began to fail.

Troops in the vicinity were put on alert .

All hospitals in the area were put on alert to receive casualties.

Police were put on alert in case larger groups of demonstrators joined in.

Emergency services were put on alert.

Soldiers and police have been put on alert.

Report, page 11 Flu outbreak puts hospitals on alert.

Security forces are on alert across Guinea's capital, Conakry, one day after opposition leader Alpha Conde was named the winner of the country's runoff presidential election.