From 180 BC, a series of invasions from Central Asia followed, with the successive establishment of the Indo-Greek, Indo-Scythian and Indo-Parthian kingdoms, and finally the Kushan Empire.

从公元前180年起，来自中亚的一系列入侵不断出现，随之连续成立了印度希腊人、印度斯基台人和印度帕提亚人的王国。

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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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This seems to have gotten mixed up with another Indo-European word pneu meaning "to breathe" and eventually to have made it to Greek as pneumon meaning "lungs."

它看上去像是被人与另一个意为“呼吸”(to breathe)的印欧语系单词pneu混到了一起，并且后来变成了意为“肺”(lungs)的希腊语单词pneumon。

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