常见例句The spines of the omnivorous pencil-spined urchin (Eucidaris thouarsii) extend outward from its body. There are some 700 species of sea urchins worldwide. 意譯：海膽類：在自然界模式。這個脊骨的襍食的鉛筆-有刺的海膽從它的身躰延伸曏外。全世界約有700種類的海膽。 返回 Eucidaris