Last Updated：2025/11/30
Sentence
その地域の化石層には、古代の淡水生態系を再構築するのに役立った二枚貝のような甲殻類が豊富に含まれていた。
Quizzes for review
Fossil beds in the region contained abundant conchostracans that helped researchers reconstruct the ancient freshwater ecosystem.
See correct answer
Fossil beds in the region contained abundant conchostracans that helped researchers reconstruct the ancient freshwater ecosystem.
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