You need to keep your guard up.

你们得提高警惕。

The good monks kept their guard.

僧侣们保持着警惕。

That's where Filch has been keeping guard, Ron muttered.

费尔奇一直在这里站岗。罗恩小声说。

But Beowulf kept guard, watching for the terrible giant.

但贝奥武夫一直在守望着这个可怕的巨人。

We're gonna have to keep our guard up.

我们得有所戒备了。

While two detectives were keeping guard at the door, two others opened the parcel.

这时两个侦探把住门口，另外两个侦探打开了包裹。

With the Labor Day holiday approaching, a U.S. infectious disease expert is warning Americans to keep their guard up.

随着劳工节的临近，一名美国传染病专家警告美国民众要保持警惕。

Old Andres and Jose should keep guard here at the campfire; his job was to find the goats that were lost.

老安德烈斯和约瑟应该在篝火旁守着，他的工作是找寻丢失的山羊。

The DPRK is in the midst of recovering from three typhoons in the past months while keeping its guard up against COVID-19.

几个月前，三次台风袭击朝鲜，朝鲜正处于恢复当中，一边对新冠肺炎保持警惕。

The coxswain pronounced a few words in his bizarre language, and no doubt he alerted his men to keep on their guard.

小艇艇长说了几句他的奇怪语言，当然是他通知水手们，大家要小心警戒。

I have to keep my guard up and so do you.

我得保持警惕 你也是。

I will keep guard while one of you goes to sit with her.

我来看着 你们谁进去陪她吧。

Just keep your guard up. There's gonna be land monsters everywhere.

保持警觉，到处都有陆地怪物。

He was thinking that in nearly every person there was some special physical part kept always guarded.

他在想， 几乎每个人身上都有一些特殊的身体部位一直受到保护。

He says his program has helped them all graduate high school and he's taught them to keep their guard up.

他说他的项目帮助他们全部从高中毕业，他教他们保持警惕。

[THOMAS JEFFERSON] And every day while slaves were being slaughtered and carted away across the waves, he struggled and kept his guard up.

他都在挣扎并保持警惕。

The wheel, the gibbet, the strappado, kept good guard around the place of refuge, and lay in watch incessantly for their prey, like sharks around a vessel.

轮子、绞刑架、绞刑架在避难所周围保持着良好的守卫，并不断地守望着它们的猎物，就像鲨鱼在船只周围一样。

It left, however, a terrible impression upon the nurse's mind, and from that time she began to watch her mistress closely and to keep a closer guard upon the baby, whom she tenderly loved.

然而，这给保姆留下了可怕的印象， 从那时起，她开始密切注视着她的女主人， 更密切地保护她深爱着的婴儿。

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.

她发现，如果大脑左半球在一个陌生的环境中为了防卫而保持警觉，它就会对不规律的哔哔声做出反应，从而把人从睡梦中唤醒，而忽略定时响起且声调不变的哔哔声。

The eagle and the man on the cross kept guard for a little while over the empty pueblo; then, as though they had seen enough, sank slowly down through their hatchways, out of sight, into the nether world.

空荡荡的印第安村庄里只有那画上的鹰和十字架上的人守望了一会儿。然后，他们也好像是看够了，慢慢沉入地下室，去了阴间，看不见了。