We see polar bears as a sentinel of climate change.

“我将北极熊看作气候变化兵。

Fling the lying sentinel over the cliffs.

“把那个撒谎扔到悬崖上去。

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

这片墓地气势宏大，一块巨大十字架如同兵一样守卫在瓜达拉马山上。

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

上海设立了超过5700个点，密切关注15类传染病。

They found that new immigrants rarely served as sentinels.

现，新加入猫鼬很少担任兵。

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

咱已经过了警戒线了。一切就靠迅速了，快跑！

Their wakeful sentinel had descried danger, and this was his warning.

那警觉现有危险情况，出警报。

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

这些巨大石柱静静地伫立在偏远高山荒野上。

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

不时出现令人奇怪景象和声音，每每这时，焦急兵总会受到迷惑。

Plotz thinks the oxpeckers may have evolved their sentinel behavior because it protects their convenient food source.

普洛茨认为，牛椋鸟可能为了保护方便食物来源，而进化出兵行为。

You looked at that, and we thought about it and said, that's brilliant, because they become sentinels.

看看这个主意，我认为这真不错，因为它成为了兵。

When an individual is on sentinel, they are basically on guard duty for the rest of the group.

“当个体侏獴放时，它基本上是在为这个群体其它成员站守卫。

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

她说，像登革热这样疾病“为我提供了一个关于气候变化非常好预警。”

On a rock which overlooked the track, showing out dark and plain against the sky, there stood a solitary sentinel.

原来有一块俯临山路岩石，在天光衬托之下显得非常黯黑而单调，岩石上孤零零地站着一个防。

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

半小时后，一个兵喊道，有一匹马和骑马人正沿着小路走来。

“What’s the news? ” as if the rest of mankind had stood his sentinels.

“有什么新消息？ ” 就好像其人都站着兵一样。

Our center now has become a sentinel of hope for the people of Khayelitsha.

我中心现在已成为 Khayelitsha 人民希望兵。

Each one of us is a sentinel.

我每个人都是兵。

The sentinels are all being changed, on suspicion.

兵都在被怀疑情况下被改变。

Warkworth has a magnificent medieval castle that stands sentinel over a lovely village.

沃克沃斯有一座宏伟中世纪城堡，守护着一个美丽村庄。