What were the earliest Americans doing for those many centuries? To a great extent, the answer is shrouded in mystery.
在那么多个世纪里，最早的美洲土著人一直在做什么呢？这个问题的答案在很大程度上是神秘而不可解的。
What were the earliest Americans doing for those many centuries? To a great extent, the answer is shrouded in mystery.
在那么多个世纪里，最早的美洲土著人一直在做什么呢？这个问题的答案在很大程度上是神秘而不可解的。
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