单词dead-languages
网络: 废弃词；死语言；死语
Because they are dead languages is no reason why they should be ignored in academic circles.
不应因它们是死的语言而就在学术界忽视它们。
They are all dead languages now.
它们都是已经废弃了的语言。
suppositious reconstructions of dead languages;
消失语言之假想的重新构建；