The fox froze, wary eyes fixed upon this strange new phenomenon.

狐狸惊呆了，一双警觉的眼睛盯着这个新出现的奇怪身影。

Thomas Jefferson is often credited with saying that The price of liberty is eternal vigilance.

托马斯·杰斐逊有一句话经常为人所称赞，自由的代价是永恒的警觉。

Petunia was breathless, alarmed at being caught.

被逮个正着的佩尼警觉的喘着气。

" 'Professor'? " repeated Riddle. He looked wary.

“‘教授’？”里德尔重复了一句，他露出很警觉的神情。

The dynamics between rivals, buyers, suppliers, new entrants, and substitutes are what keep any healthy private sector industry on its toes.

竞争对手、买家、供应商、新竞者和替代者之间的动态是任何健康的私营部门行业保持警觉的原因。

The research team say they believe the alert but passive nature of television watching may be creating stress on the mind, which contributes to memory decline.

研究小组表示，他们时的被动警觉可能会在心理上造成压力，从而导致记忆力下降。

Biologist Sara Angrioti says the zero sightings is alarming but not surprising.

生物学家Sara Angrioti表示，大白鲸的消失不仅让人吃惊，更要引起人们的警觉。

Boa's aren't venomous but his escape still set off alarms both actual and emotional.

蟒蛇并没有毒，但他的逃跑仍然引起了实际和情感上的警觉。

Fish and other sea animals can hear well and many of them can make different types of warning sounds. In the future you will be hearing more and more about the sea.

鱼和其他的海洋动物有很好的听觉，而且它们能产生很多不同种类的警觉声音。 在未来，你可能会听到越来越多关于海洋的事情。

The San Francisco SPCA says it's important to begin teaching your dog to learn how to be OK with being alone for short stretches of time and to be alert for signs of separation anxiety.

旧金山动物协会建议现在开始教你的狗学会如何在短时间内保持独处的状态，并且对与主人分开焦虑的迹象保持警觉是很重要的。

It puts us in this state of heightened vigilance, where we tend to give more attention to negative distractions even if they're not that important — like an angry stranger on Twitter or an upsetting email.

大脑让我们处于高度警觉的状态，我们倾向于更多地关注消极的干扰，即使它们不是那么重要——比如推特上一个愤怒的陌生人或一封令人不安的子邮件。

I'm usually quite on the ball when it comes to scams.

当遇到骗局时，我通常是很警觉的。

For starters, people who chew gum tend to be more alert and experience less stress.

首先，嚼口香糖的人往往更加警觉感觉到的压力更少。

Studies show that exposing yourself to cold water can activate components of the brain responsible for regulating wakefulness, making you feel alert.

研究显示，冲冷水可以启动大脑，掌控警觉的部位，提高你的注意力。

Change by the people who are most alarmed will not be enough.

仅仅靠最警觉的人的改变是不够的。

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.

她还从之前对鸟类和海豚的研究中得知，这些动物每次睡觉会让一半的大脑处于睡眠状态，这样它们就可以在休息的同时保持足够的警觉，以躲避捕食者。

A short nap can make you more alert and help you focus.

短暂的午睡能让你更加警觉，提高你的专注力。

We are assessing their pain. So, to do that, to be able to assess… how alert the patient is, I would ask the patient questions like, " Can you tell me your name" ? and " What is your date of birth" ?

评估他们的疼痛程度。所以，为了做到这一点，为了能够评估患者的警觉性，我会询问患者一些问题，比如，" 能告诉我你的名字吗？" ，" 你是哪天出生的？"

You as the driver must always keep your eyes and your mind on the road.

作为驾驶员，您必须始终保持对道路的密切关注和头脑的警觉。

Being afraid means you're extra aware and extra vigilant.

害怕意味着你是格外警觉和警惕的状态。