noun ダウンロード 🔗共有 歩帯 (of an echinoderm) A row of pores for the protrusion of appendages such as tube feet. Examples : "The sea star uses its ambulacra, visible as rows of tiny holes along its arms, to extend its tube feet and grip onto rocks. " ヒトデは、腕に沿って並んだ小さな穴として見える歩帯を使って、管足を伸ばし岩に掴まります。 anatomy animal biology organism part AIとチャット語彙ゲーム読解練習