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.
两年前，一组由语言学家组成的考察队挺进印度东北部的偏远山区对那里鲜为人知的语言进行研究，其中许多语言由于没有文字形式正面临着荒废的危险。
Two years ago, a team of linguists plunged into the remote hill country of northeastern India to study little-known languages, many of them unwritten and in danger of falling out of use.
在Pagel博士的分析中，他希望系统地研究这个问题并能囊括没有文字历史的语言。
Dr Pagel, however, wanted to examine the question systematically and to include languages with no literary history in his analysis.
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