Imagine that an alien species landed on Earth and, through their mere presence, those aliens caused our art to vanish, our music to homogenize, and our technological know-how to disappear.

想象一下，外星物种登陆地球，而他们的存在会让我们的艺术消逝，同化我们的音乐，也让我们的技术知识消失了。

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He believes marks of alien life may even be found here on Earth.

他认为在地球上甚至可能会发现外星生命的痕迹。

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Often, alien beings who crash-land on Earth find that their alien biology gives them amazing powers on our planet.

通常那些迫降在地球上的外星人发现其特殊生理结构在我们的星球上拥有令人惊叹的能力。

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And while researchers have yet to find a true alien Earth, they're getting closer and closer.

MSN: Does 'potentially habitable' alien world exist? - Technology & science - Space - Space.com | NBC News

Wells classic about an alien invasion of Earth.

NPR: Slate's Summary Judgment: 'War of the Worlds,' 'Rebound,' 'The World'

"XCOM: Enemy Unknown" is a science fiction, strategy game pitting Earth against an invading alien force.

CNN: Two games in one in 'XCOM: Enemy Unknown'