NASA has started a 10-year search for extraterrestrial intelligence.
美国航空航天局已经启动了一个为期10年的寻找外星生物的项目。
The real threat would come from the discovery of extraterrestrial intelligence.
真正的威胁会来自于外星智慧生物的发现。
Have an extraterrestrial being really in the world?
世界上真的有外星人么？
Conversationturned to the possibility of extraterrestrial life.
他们的话题转到是否可能存在外太空生命上。
Superchiral light could even aid the search for extraterrestrial life.
超手性光束还可能有助于寻找外星生命。
He was the first human being to set foot on an extraterrestrial world.
他是第一个人上设置一个外星世界英尺。
Instead, it is an early warning System for extraterrestrial incursion.
他是不善外星人入侵的警告系统。
Extraterrestrial life has often become the subject of science fiction films.
科幻片经常以外星生命为主题。
Extraterrestrial life represents an enormous gap in our knowledge of nature.
外空是否存在生命，这是我们对自然认识的空白。
The search for extraterrestrial intelligence, or SETI, is a 50-year-old idea.
用这个方法搜索地外文明（英文为SETI），已是一个有50年历史的构想了。
The extraterrestrial would say we all speak dialects of one common language.
这位外星人会觉得，我们都在讲一种语言中的不同方言。
He says Alien, a tale of an extraterrestrial monster, also fits into the category.
他也提到了《异形》，一部关于外星怪物的故事，也属于这个类型。
On the question of 'external guidance', he does not rule out extraterrestrial help.
至于“遥控指导”的问题，他没有排除外星人的帮助。
Of course, there is always the chance that extraterrestrial life will find us first.
当然，很有可能外星生命先发现我们。
No extraterrestrial culture, or alien technology has ever been uncovered by anyone.
没有任何人发现外星文明或技术。
Discovering just one extraterrestrial civilization would have profound significance.
仅仅发现一个地外文明世界就会具有很深的意义。
Skeptics also ask why there is no clear evidence of extraterrestrial visits to Earth.
持怀疑态度的人还对为什么没有明显证据证明外星人到过地球提出了疑问。
He theorized that there are possible answers to whether there is extraterrestrial life.
另外他还推理了对于是否存在外星生命的可能回答。
Even extraterrestrial-related theories have been proposed with little evidence in support...
有人甚至提出了几乎没有什么证据支持的有关外星人的理论。
There is simply no actual evidence at all linking UFOs with an extraterrestrial source.
根本没有任何证据能将众多ufo和来自于地球外联系在一起。
But either way, the answer is as speculative as the search for extraterrestrial life itself.
但无论哪种方式，答案就和寻找外星生命本身一样是具有推测性的。
There is a slight possibility that it just might originate from an extraterrestrial intelligence.
有微小的可能性说明这也许是来自于外星智慧。
In the deepest sense, the search for extraterrestrial intelligence is a search for ourselves.
从最深层次的意义来说，探寻外星人就是寻找我们自己。
The standard approach to answering that question focuses on the search for extraterrestrial intelligence.
回答这种问题的标准方法着重于寻找外星文明。
Second, the physical form of extraterrestrial species reflects human attitudes toward species on Earth.
第二，外星人的外形反映出人类对于地球物种的态度。
Second, the physical form of extraterrestrial species reflects human attitudes toward species on Earth.
第二，外星人的外形反映出人类对于地球物种的态度。
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