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谁也不知道,在历史的长河里,有多少语言悄悄地消失了,有些还留下了一些无法解读的文献,更多的却烟过无痕,消失得无影无踪。我们现在很清醒地看到,人类丰富
No one knows how many languages have quietly disappeared in the long history of history, while others have left some untraceable literature. Mostly, the smoke has disappeared and disappeared without any trace. We are now soberly aware that human beings are rich