Proto-Indo-Europeans
A classification system based on syntaxa
(anatomy) Either of the two valves in the heart, situated between the atria and the ventricles, that prevent backflow from the ventricles into the atria during systole.
Misspelling of idiosyncratic.
plural of Proto-Indo-European
原始インド・ヨーロッパ人は数千年前にポンティック＝カスピ海草原を移動し、多くの子孫諸語に言語的痕跡を残しました。
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