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Windows of Knowledge

Are aliens out there?

作者:21ST
Aa
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浩瀚的宇宙里究竟有没有外星人?

WE call them aliens (外星人) or sometimes ET (Extraterrestrial). We make movies about them even though we have never seen them. We don’t even know whether they are real or not. But we never *stop looking for them.
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