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Span Details
疫学
epidemiologynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
研究
research; study; investigationnoun, suru verb
で
location, means, or scope markergrammar
感染経路
infection route; transmission route; source of infectionnoun
が
subject markergrammar
明らかになった。
become clear; become evident; come to light; be made public; be disclosed; be revealed-> 明らかになるexpression, verb