sea urchin編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看sea urchinsea urchin — 名詞名詞1. a small, round sea animal with a hard shell covered in sharp spines1.名詞釋義海膽a small, round sea animal with a hard shell covered in sharp spines例句The sea urchin moved slowly across the ocean floor.