url:https://www.youtube.com/watch?v=ay8tArq_JHQ
農業生產力:衡量農業產出與投入的比率 by Let's Back Up 360 No views 27 minutes ago 2 minutes, 18 seconds
チャンネル:『Let's Back Up 360』さん
https://www.youtube.com/@letsbackup3604
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