Proto-Indo-European
noun [ U ] uk/ˌprəʊ.təʊˌɪn.dəʊˌjʊə.rəˈpiː.ən/ us/ˌproʊ.t̬oʊˌɪn.doʊˌjʊr.əˈpiː.ən/ (abbreviation PIE)
原始印欧语
the ancient language, of which there are no records, that experts think Indo-European languages developed from
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