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。

Oh! So your brain will stay alert?

哦！所以你的大脑会处于警觉状态？

Norepinephrine has substantial effects on focus, attention, vigilance and it improves mood.

去腺素对人的专注度、注意力和警觉性都有显著影响，而且可以改善情绪。

'What's the matter? ' she said in alarm.

“出什么事了？”警觉地问。

" '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。

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

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。

When dogs are alert, they stand with their tails raised and ears up.

当狗警觉时，耳朵会竖起来，尾巴也会立起来。

Now, that's the precision of their methods, but there's also the vigilance.

而现在来谈谈这些方法的准确性，但同时也包含了警觉性。

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的警觉。

In this way, employees would feel more rested and alert.

这样员工会感觉休息得更充分，也更加警觉。

But I'm finding now awareness has peaked and it's going over into activism.

但是现在我发现人们对塑料的警觉达到顶峰，而且已经转变为行动主义。

Keep you on your toes, Huda. - Yeah.

让你保持警觉，胡达。 - 是啊。

That is the hard reality we face today, said Ms. Glick. We must remain vigilant.

这也是我们今天面临的现实。我们必须保持警觉。

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。

Alcohol causes a loss of judgment and alertness.

酒精使人失去判断力和警觉性。

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。

If you describe someone as 'sharp', it means they're alert and they can think quickly.

如果你用“sharp”来形容某人，意思是他们很警觉，思维敏捷。

The United States is profoundly alarmed by the UNICEF report.

美国对联合国的这则报告深表警觉。

This sends him a message. It tells him that you are alert.

你非常警觉。