可能是某一種外星人曾經來地球旅行留下的痕跡呢？人家後來不一定是集體死了，很可能是集體離開地球了。

來源: OceanSound 於 2021-09-25 07:46:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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