Historical linguists have to identify and classify families of related languages in a genealogical family tree, and to reconstruct the protolanguage.
语言学
们通过对各语
中相关语言进行甄别，勾画出族谱图，从而重新构建语的原始语。
谱的,
谱的,
的谱,,谱;
的;
事;传下来的;统树，谱树Historical linguists have to identify and classify families of related languages in a genealogical family tree, and to reconstruct the protolanguage.
语言学们通过对各语中相关语言进行甄别，勾画出族谱图，从而重新构建语的原始语。
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