He recognized that Sanskrit, the language of India, was related very closely to Latin, Greek, and the Germanic and Celtic languages.
他认识到梵语,即印度的语言,与拉丁语、希腊语、日尔曼语和凯尔特语密切同源。
《柯林斯英汉双解大词典》
In the 18th century, scholars who have studied the ancient languages, Sanskrit, Latin and Greek, noticed that these three languages had many similarities.
18世纪研究古代语言(梵语、拉丁语和希腊语)的学者们注意到这三种语言有许多相似之处。
Proto-Indo-European is a reconstructed language, meaning, it is what linguists concluded a parent language of Sanskrit, Latin and Greek would have to be like.