origin
A very small (typically unicellular) photoautotroph
plural of pole-axe
plural of endoamylase
The beginning of something. / The source of a river, information, goods, etc. / (mathematics) The point at which the axes of a coordinate system intersect.
研究者たちはウイルスの起源が市内の小さな市場にあることを突き止めた。
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