This is a delicate point: find a proof that an UFO visited us.
由此争论的症结便出来了：找到一个U FO造访我们的证据。
Contrails appear most vivid around sunrise or sunset, and it's not uncommon that one showing up in an unexpected location will generate whispers of a UFO or experimental military aircraft.
凝结尾在日落和日出时，会显露得非常生动，这种情况并不少见，一个意外的位置上所显露出来的现象将产生与ufo或实验用军事飞机相类似的低低声音。
'Even if this is not a UFO that landed in the ocean that was being used as an alien base, it is still a monumental discovery, ' he writes.
他写道：“即使这不是着陆在海洋、用作外星人基地的UFO，它仍然是一个重大的发现。”
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