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Sentence
Span Details
人為突然変異
induced mutationnoun
は
topic markergrammar
品種改良
selective breeding; breeding improvementnoun, no-adjective
に
direction, time, indirect object, or target markergrammar
利用
use; utilization; applicationnoun, suru verb
される
passive, potential, or respect auxiliarygrammar
ことがある。
have done (something); something has occurred; sometimes; there are times when-> 事があるexpression, verb