世贸中心倒塌前102分钟里的声音记录面世了。

Voice messages of the final 102 minutes at the World Trade Center has emerged.

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该站提供美国历史地图，电影照片，图片和出版品，声音记录等。

American Memory US historical maps, motion pictures, photos and prints, sound recordings.

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哈里森：语言的消亡意味着人类知识库的湮灭，消亡时没有留下任何文字或声音记录的语言则更加剧了这种损失。

Mr Harrison: the human knowledge base is eroding as we lose languages, exacerbated by the fact that most of them have never been written down or recorded.

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