1.And now the snakes are on the alert.

这些游蛇正虎视眈眈。

2." Everybody is on the alert because of what happened with AstraZeneca, "

" 由于阿斯利康事件，现在所有人都保持警惕。"

3.On Christmas Eve, the children were on the alert for any sign of Santa Claus.

在夜，孩子们随时注老人出现的蛛丝马迹。

4.A single bull would need to be on the alert to every form of danger.

独行的雄龙需要留各种形式的危险。

5.“My Lord, I was constantly on the alert, ” came Lucius Malfoy's voice swiftly from beneath the hood.

“主人，我一直非常留心，”卢修斯·马尔福的声音迅速从兜帽下面传来。

6.It turns out that our brains are exquisitely designed to keep us safe and on the alert for danger.

原来我们的大脑是被精心计来保护我们的安全并保持危险警惕的。

7.His ears, his nostrils were on the alert.

他的耳朵， 他的鼻孔都于警戒状态。机翻

8.Instantly the askaris and the whites were on the alert.

阿卡里人和白人立即警觉起来。机翻

9.His gallantry was always on the alert.

他的勇敢始终于警戒状态。机翻

10.Be on the alert for anyone acting suspiciously.

【alert】警惕举止可疑的人。

11.Despite the Demon Slayer Corps being on the alert, they still got us.

尽管鬼于戒备状态，他们还是得逞了。

12.But with the council back on the alert, it is not a good time for Stefan to fly off the handle.

但是委员会现在又起了疑心，Stefan这样失控可太不是时候了。

13.The dog too was on the alert in an instant, and ran whining to the door.

狗也立刻警觉起来，呜呜叫着跑到门口。机翻

14.But Henriette, on the alert, had at once perceived the look with which he had first enveloped Denise.

但是，警惕的亨丽埃特立刻察觉到他最初投向丹妮丝的目光。机翻

15.He was never free from suffering and he was constantly on the alert to prevent anyone from seeing it.

他从来没有摆脱过痛苦， 而且他时刻保持警惕， 以防止任何人看到它。机翻

16.He had been on the alert all the while, trying to catch what the governor and Sipiagin were saying.

他一直保持警惕， 想听懂州长和西皮亚金在说什么。机翻

17.But with elephants the opposite is true; a single elephant is always on the alert, but a herd is usually more careless.

一头象永远于保持警惕的状态，而象群却非常随。

18.It was impossible to tell what he would do or say next, and you were kept perpetually on the alert.

不可能知道他接下来会做什么或说什么， 你永远保持警惕。机翻

19.My companion was paralysed by the sudden horror of it, but I, as may well be imagined, had every sense on the alert.

我的同伴被这突如其来的恐怖吓得瘫痪了， 但我，正如可以想象的那样， 完全清醒了。机翻

20.For many minutes Duncan succeeded in keeping his senses on the alert, and alive to every moaning sound that arose from the forest.

有好几分钟，邓肯成功地让自己的感官保持警觉，并且对森林中传来的每一声呻吟都保持清醒。机翻