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在广袤的地球上，太多的未知领域等待着探险家们去探索。天空、海洋、险峰、极地、原始森林、未知河流、神秘地带、古老文明......探险家们的脚印留在了地球及宇宙的许多角落。他们的勇气使人类诞生了在各个未知领域的第一次......
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