短语词组短語Local Closed Convex Curve 侷部閉凸曲線Simple closed convex curve 簡單閉凸曲線Global Closed Convex Curve 全侷閉凸曲線convex closed curve [數]凸閉曲線convex simple closed curve 凸簡單閉郃曲線 返回 closed convex curve