剑桥词典a type of sea creature with raised areas or sharp points on its skin and a body made of five equal parts arranged around the centre 棘皮动物（一种海洋生物，表皮有凸起或棘刺，身体呈五辐对称形） Echinoderms like the starfish live on the sea floor . 像海星这样的棘皮动物生活在海底。 返回 echinoderm