英语词汇“stone canal”是什么意思，“stone canal”的读音、用法及例句翻译-乐坝网

词汇	stone canal
释义	stone canaln.（名词） A calcareous duct in echinoderms that leads from the madreporite to a ring-shaped canal around the mouth.石管：棘皮动物体内由筛板通向口部附近环状管道的钙质的导管
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