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  1. sea urchin

    英式

    • n.
      a marine echinoderm having a spherical or flattened shell covered in mobile spines, with a mouth on the underside and calcareous jaws.
    • noun: sea urchin, plural noun: sea urchins

    • 更多解釋
    • IPA[ˈsē ˌərCHən]

    美式

    • n.
      a marine echinoderm that has a spherical or flattened shell covered in mobile spines, with a ...

    Oxford American Dictionary