THE human cost is clear, even if the cause is baffling.
纵使原因令人困惑不已，但人类付出的代价确是如此清晰。
What if we encounter an alien civilization whose intentions are completely baffling?
问题是，如果完全无法判明我们所遭遇的外星文明的来访意图，该怎么办？
What if we encounter an alien civilization whose intentions are completely baffling?
问题是，如果完全无法判明我们所遭遇的外星文明的来访意图，该怎么办？
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