Language is the experimental material of language science. Endangered languages contain rare language features, which are profound and rich for language research. Because our history of language research is still very short and our understanding of language is still very superficial, the disappearance of each language will take away linguistic information, resulting in the loss of an opportunity to understand the nature of language and a sample of research. this means that it will be more difficult for us to understand the true meaning of language.
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The disappearance of endangered languages will be an irreparable loss in the study of language science