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.

原始印欧语是一门经过重构得出的语言，也就是说，这就是语言学家总结出梵语、拉丁语和希腊语的母系语言的样子。

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Most languages derive from one parent language. Mednyj Aleut has two parents.

绝大多数语言只源自一种父系语言，而Mednyj Aleut却有两个源头。

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A systematic study revealed that many modern languages descended from a common parent language, lost to us because nothing was written down.

系统的研究显示，许多现代语言起源于一个共同的母语，但由于没有文字记载，该母语已经失传。

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Jennifer Powell-Lunder, a clinical psychologist and author of "Teenage as Second Language: A Parent's Guide to Becoming Bilingual, " says midcareer professionals must be especially vigilant about recognizing when they sound like teen wannabes.

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The apes, by contrast, sit behind bars, don't benefit from language or a nearby parent who knows the answers, and are facing members of a different species.

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All of which makes it disappointing, to say the least, that the Motion Picture Association of America decided to give the film an R rating requiring minors to be accompanied by a parent or guardian because of the brief use of explicit language.

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