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A worm cast is a structure created by worms, typically on soils such as those on beaches 〔(BBC Beach Life )〕〔(North Wirral - Intertidal Habitats )〕 that gives the appearance of multiple worms. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Worm cast」の詳細全文を読む スポンサード リンク
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