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Sentence
Span Details
示相化石
facies fossilnoun
は、
topic markergrammar
当時
at that time; in those daysnoun, adverb
の
possession, attribution, nominalizer, or nominal linkergrammar
環境
environment; surroundings; circumstancesnoun
を
object markergrammar
推定
presumption; assumption; estimationnoun, suru verb, no-adjective
する
light/support verb with a noun or noun-like phrasegrammar
のに
although; despite; in order togrammar
役立つ。
be useful; be helpful; serve the purposegodan verb