One of the few includes the Zoo hypothesis. This is based on the assumption that the extraterrestrial beings simply choose not to interact with us humans.
其中之一包括了动物园假说，根据是外星生命干脆选择不和人类相互接触。
One of the few includes the Zoo hypothesis. This is based on the assumption that the extraterrestrial beings simply choose not to interact with us humans.
其中之一包括了动物园假说，根据是外星生命干脆选择不和人类相互接触。
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