Ultimately, the Earth's nations must work together to combat this extraterrestrial threat.

最终, 地球上的各个国家必须共同努力应对这外星威胁。

No, Scott didn't turn into an extraterrestrial.

不，斯科特并没有变成外星。

And it would be tragic if we killed the first extraterrestrial life we found.

如果我们杀死了我们发现的首个外星生命，那可就悲剧了。

Nothing is known about how extraterrestrials might take in information.

关于外星如何息，我们一无所知。

This doesn't mean that we discovered extraterrestrial life on venus far from it.

这并不意味着我们在遥远的金星上发现了外星生命。

SETI stands for the Search for Extraterrestrial Intelligence.

SETI是“搜寻地外文明”的英文简写。

We use it for everything from Skype to the search for extraterrestrial life.

另一個系統Twister亦同，諸如此類。

In short, this ancient water could hold gas, microbes and hints about extraterrestrial life.

总之，这种古老水源可能包含气体、微生物和与地外生命有关的东西。

Naturally, it raises more questions about the possibility of some kind of extraterrestrial life there.

当然，它提出了更多关于地外生命存在可能性的问题。

People could be shocked at such a sight and mistake a sprite for an extraterrestrial object.

们可能会对这样的景象感到震惊，误以为“精灵”是外星物体。

Potential explanations have been offered for the truly mysterious disappearances, including paranormal activity and extraterrestrial encounters.

对于这里发生的真实神秘事件可能的解释是这里有灵异活动，以及他们遭遇了外星。

So if an extraterrestrial civilization wised up and stopped polluting, we might still see the effects.

所以如果外星文明识破我们的伎俩, 停止污染, 我们仍然会看到效果。

Some people think they could be a form of communication from extraterrestrial life trying to contact us.

一些认为该号可能是外星生物的一种交流方式，他们在试图联系我们。

The exact proportion of locally sourced versus extraterrestrial water is still a topic of argument among scientists.

内生水和外来水的准确比例一直是科学家们争论的话题。

Some people thought this was an extraterrestrial type thing, a large barn owl or a sandhill crane.

有些认为这是一种外星生物，也有说它可能是一只大仓鸮或沙丘鹤。

Studying the earth-like planet could help in the hunt for extraterrestrial life

研究类似地球的行星有助于寻找外星生命。

One hypothesis that has gained popularity among paleontologists is the role of extraterrestrial impacts in shaping the Mesozoic area.

有一种假说在古生物学家中越来越受欢迎，那就是外星撞击在塑造中生代地区中所起的作用。

Last year, McTier's advisor challenged her to find something else on exoplanets: evidence of extraterrestrial mountains.

去，麦克蒂尔的导师给了她一项挑战性任务：在太阳系外行星上寻找其他东西：外星山脉的证据。

THE space race between America and the Soviet Union was as much about ideological one-upmanship as extraterrestrial exploration.

美国和苏联的空间竞争是关于外星探索上谁高一等的问题。

That raises all sorts of questions: Would extraterrestrial beings at those distances have the means to reach Earth?

距离那么远的外星生物有办法到达地球吗？