"Alien Contact," for example, is an exercise developed for middle-school students who use hand-held devices that can determine their location.

例如，“Alien Contact”是为中学生开发的一种练习，他们可以使用手持设备来确定自己的位置。

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Naked Science: Alien Contact, The National Geographic channel.

——《科学新发现：与外星生命接触》，国家地理频道。

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Yet another problem is that there is already another international group competing to manage the issue of alien contact.

另一个问题是，已经有另一个国际组织在竞争管理有关与外星人联系的问题。

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That is unless we do ever contact alien life that is comprehensible.

BBC: How sci-fi moves with the times

He also suggested that the potential threats posed by contact with alien intelligence should discourage us from actively sending out messages to the cosmos.

CNN: Should we fear space aliens?

If we ever make contact with an alien civilization and we want to explain to them who we are, the best thing we can do is get them a Facebook account.

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