We see polar bears as a sentinel of climate change.

“我们将北极熊看作气候变化的哨兵。

Fling the lying sentinel over the cliffs.

“把那个撒谎的岗哨扔到悬崖上去。

Strange sights and sounds occurred at different moments to bewilder the anxious sentinels.

不时出现怪的景象和声音，每每这时，焦急的哨兵总会受到迷惑。

There were more dementors in here, casting their freezing aura over the place; they stood like faceless sentinels in the corners farthest from the high, raised platform.

里面有更多的摄魂怪，面无表情地像哨兵一样站在离房间的角落里，所散发出的寒意笼罩着整个地牢。

They're called sentinel chickens, and their sole purpose is to be monitored for signs of dangerous viruses like the West Nile virus.

他们被称为「哨兵鸡」，它们的唯一目的是监测像西尼罗河病毒等危险病毒的迹象。

It is a grandiose burial site. A huge cross stands sentinel in the Guadarrama hills.

这片墓地气势宏大，一块巨大的十字架如同哨兵一样守卫在瓜达拉马上。

Standing like a lonely sentinel on Titano’s farthest peak, is Montale, the smallest of the towers. Although the tower itself is now closed, its remoteness means you’ll enjoy the mountain’s cool air without the crowds.

而蒂塔諾最遠處的峰上，則站立了 宛如哨兵般的蒙塔萊 (Montale)，也是三座高塔中最小的一座。 这座塔本身 目前虽未开放，而且地处偏远，但意味着您可以远离群熙攘 尽情享受凉爽气。

Shanghai watches for 15 categories of infectious disease at more than 5,700 sentinel sites.

上海设立了超过5700个哨点，密切关注15类传染病。

We are through the line of sentinels. Everything depends on speed. Hurry on!

咱们已经闯过了警戒线了。一切就靠迅速了，快跑！

The colossal pillars stand mute sentinel over a remote alpine wilderness.

这些巨大的石柱静静地伫立在偏远的高上。

And two sentinel badgers (the white patches on their cheeks were all Edmund could see of them) leaped up with bared teeth and asked them in snarling voices, " Who goes there? "

两只负责守卫的獾（爱德蒙唯一能看到的就是他们脸颊上的白斑）跳起来，一边露出雪白锋利的牙齿尖声问道：“谁在那里？”

In a playback study, the researchers found that mongooses responded far less to the sentinel calls of recent immigrants than to those from others they already knew and trusted.

在回放研究中，研究员发现，与其它已经了解且信任的成员相比，猫鼬对新哨兵呼叫的反应要少得多。

One of the first to meet out this sort of justice was the ancient Greek General Iphicrates, who famously stabbed to death, a sleeping sentinel on the spot with a spear.

第一个遭遇这种审判的是古希腊将军伊费克拉底司（Iphicrates），他曾用长矛当场刺死了一个熟睡的哨兵。

So on this expedition, we're trying to apply tags to sea turtles to see if they can serve as sentinels for seagrass health on this expedition.

因此，在这次考察中，我们也试图给海龟贴上一些标签，看看它们能否在这次考察中担当起海草健康哨兵的角色。

Odette Serenae who also suffered from Noma now receives regular follow-up treatment at the sentinels clinic including support in finding a job.

同样患有诺马氏菌病的奥德特·塞雷内现在Sentinels诊所接受定期后续治疗，包括帮助她找工作。

They helped to track and hunt prey, and might have served as sentinels to guard camps and warn of approaching enemies.

它们帮助类追踪和猎杀猎物，还可能充当哨兵，守卫营地和警告接近的敌。

Every empty, shell-pitted house they had passed that day, every gaunt chimney standing sentinel over smoke-blackened ruins, had frightened her more.

那天他们经过的每一幢弹痕累累、空无烟的房子，每一个像哨兵似的站在火后废墟上的干瘦的烟囱，都使她愈来愈害怕了。

Half an hour later one of the sentinels cried out that a horse and rider were coming down the trail.

半小时后，一个哨兵喊道，有一匹马和骑马的正沿着小路走来。

At the sight of the centaur Firenze, who was standing like a sentinel near the water's edge, she gave a start and scurried hastily into a seat a good distance away.

她一看见像哨兵一样站在湖边的马费伦泽，就吓得匆匆忙忙坐到远处一个座位上去了。

She said diseases like dengue, " provide us a really good sentinel of what is happening with climate change."

她说，像登革热这样的疾病“为我们提供了一个关于气候变化的非常好的预警。”