警觉

在研究人员们给松鼠的喂食器上喷了松貂的气味后，他们发现只有红松鼠作出了反应，它们在嗅出危险时表现得更警觉。

When the researchers applied4 pine martens ' scent5 to squirrel-feeding stations , they found that only the red squirrels responded , showing much more vigilance when they sniffed6 out the danger .

SD后注意力下降、警觉水平降低；

Attention ability declined and vigilance level lowered after SD .

他们问到钱的问题时，她就警觉起来。

Their questions about the money put her on the defensive .

进攻未奏效，反而使敌人警觉起来。

The attack was unsuccessful and served only to alert the enemy .

突然他发觉自己醒了过来，而且高度警觉。

Suddenly he found himself awake and fully alert .

这些抗议活动确实引起了政府的警觉和注意。

These protests have really made the government sit up and take notice .

马蹄声引起了伊莎贝尔的警觉。

The stamp of hoofs alerted Isabel .

楼下的响声使他警觉，他坐起来打开灯。

Alerted by a noise downstairs , he sat up and turned on the light .

他们警觉地注视着我们。

They eyed us with alarm .

那样的一次失败会令你警觉起来，开始思考。

A defeat like that makes you sit up and think .

他带着怀疑和警觉的眼光看待这些事件。

He viewed the proceedings with doubt and alarm .

一个警觉的邻居发现了他。

He had been spotted by an alert neighbour .

他激烈的竞选言辞使反对党派一连几个月都保持警觉。

His fiery campaign rhetoric has kept opposition parties on their toes for months .

他们政治上非常警觉。

They are politically very aware .

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。

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

他看上去又高又壮，面色黝黑，满脸警觉，真叫人有点害怕。

He looked tall and powerful and , with his dark , watchful face , a little threatening .

那只猫对任何响动都很警觉。

The cat is alert to every sound and movement .

飞行员对气候的变化必须警觉。

A pilot must be awake to changes in the weather .

呼唤者的声音使她警觉起来。

The voice of the caller alerted her .

她十分警觉，所以报告中没有一个错能逃过她的眼睛。

So alert she was that not a single error in the report slipped her .

海防战士警觉地注视着出现在海面上的黑点。

The coast guard kept a watchful eye on the black dot that had appeared out at sea .

一项研究揭示，当你在一个陌生的地方睡觉时，你一半的大脑会保持警觉，准备应对危险。

Half of your brain stays alert and prepared for danger when you sleep in a new place , a study has revealed .

研究人员解释说，这个研究证明，当我们处于全新的环境中，部分大脑会保持警觉，以便于人能够抵抗任何潜在危险。

The researchers explained that the study demonstrated when we are in a novel environment the brain partly remains alert so that humans can defend themselves against any potential danger .

她还从之前对鸟类和海豚的研究工作中得知，这些动物每次睡觉时都让它们的半边大脑处于睡眠中，这样它们能够一边保持对捕食者的警觉，一边休息。

She also knew from previous work conducted on birds and dolphins that these animals put half of their brains to sleep at a time so that they can rest while remaining alert enough to avoid predators .

她发现，如果大脑左半球在陌生的环境中为了防卫而保持警觉，那么它会对这种不规律的蜂鸣声有所反应，从而把睡眠中的人弄醒，但是会忽略定时响起且音调不变的蜂鸣声。

She worked out that , if the left hemisphere was staying alert to keep guard in a strange environment , then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones .

不眠、保持警觉和好斗可以造就一个好猎手

Wakefulness , watchfulness , and bellicosity make a good hunter .

天黑后外出要提高警觉，不要去危险的地方。

Keep your wits about you when you go out after dark – don 't go anywhere dangerous !

他迅速挥舞着手中的剑，蛇还没有警觉到的时候尾巴尖就被削断了，掉到地上以后还在扭动着。

He swung the sword so quickly that the snake had no warning . And the tip of its tail began writhing17 , all by itself , there on the floor .

随后，她听到了一阵急促的低语从她身后传来，“这边走，我知道另一条出路。”雷茜警觉地环顾四周，惊讶地发现浴室里竟然有一个啦啦队队长正站在她的身后。

Then she heard an urgent whisper coming from behind her ... " This way ， quick ， I know another way out ! " Spinning around , Lacey was shocked to see another cheerleader standing12 in the bathroom behind her .

UK测验中的后期增减率可较好地反映SD后警觉水平的变化。

The rate of varying of UK can show the lowering alertness after sleep deprivation .