He had been spotted by an alert neighbour.

The all clear was sounded about 10 minutes after the alert was given.

警报发出10分钟后又响起解除的信号。

Sirens sounded an end to the red alert.

警报声宣告了红色预警的结束。

Soldiers and police have been put on alert.

士兵和警方都已进入警戒状态。

Due to a security alert, this train will not be stopping at Oxford Circus.

由于安全戒备的原因，该次列车在“牛津街口广场”站将不停留。

I managed to walk around unchallenged for 10 minutes before an alert nurse spotted me.

我四处走动了10分钟，没有受到查问，之后一位警觉的护士发现了我。

"Will you call the board to alert them that I feel I should resign?" — "I'll do it. But I think you're copping out."

“你能不能给董事会打电话，提醒他们我觉得自己应该辞职？”——“我会的，但我认为你这是在逃避责任。”

All the Plymouth hospitals are on red alert.

普利茅斯所有的医院都处于紧急状态之中。

Her expression was watchful and alert.

她露出一副察言观色、处处提防的表情。

Four seconds later, the controller issued a low-altitude alert to the pilot.

四秒钟后, 管制员向该飞行员发出了 低高度 警告.

Always alert to potential attacks and thwart them before they happen.

时刻警惕可能存在的抨击,先发制人.

The " vigilantes " in the market are supposedly alert to any inflationary threat.

按理,市场中的 “ 积极分子 ” 会提防任何通胀威胁.

A good teacher should be very alert to his students'progress.

一位好的教师应对学生取得的进步非常敏感.

And they had to be alert to Chelsea's countering.

同时他们亦需要提防切尔西的反击.

He always alert to his surroundings, scanning for threats.

他总是对周遭的环境十分警惕, 搜索那些潜在的危险.

Still, there are a few indicators that you can alert to.

不过, 有几个迹象可以让您提高警惕.

But we have to be alert to the challenges which lie ahead.

不过,对于今后的种种考验,我们却不可掉以轻心.

Designers and contractors should be alert to constant innovations in bridge design and construction methods.

设计者和承包商们要注意桥梁设计和施工方法的不断革新.

One should be alert to involvement of other organ systems in diagnosing these entities.

诊断这些疾病时,应警惕其它器官系统受到连累.

Feminine craft was alert to prompt it.

女性的机灵会警觉地提醒她说出适当的话语.

The cat is alert to every sound and movement.

那只猫对任何响动都很警觉.