单词proto-indo-european
n.: 原始印欧语（据信为所有印欧语言之源头）
网络: 原始印欧语系；原印欧人；元印欧语
原始印欧语（据信为所有印欧语言之源头）:
the ancient language on which all Indo-European languages are thought to be based. There are no written records of Proto-Indo-European, but experts have tried to construct it from the evidence of modern languages.
Yet, Proto-Indo-European is believed to be the ancestor of most European languages.
然而，他们认为原始印欧语系是大多数欧洲语言的祖先。
During the third millennium BC, speakers of Proto-Indo-European reached most of Europe.
在公元前的第三个千年里，使用原始印欧语的人群散布至欧洲大部分地区。
Experts say the people in that area spoke a language called Proto-Indo-European.
专家说那个地区的人使用一种叫做古印欧语的语言。