短语词组短語convex -hull approximation 凸包逼近convex x hull 凸包closed convex cones hull 閉凸錐包convex closed hull [數]凸閉包convex cone hull 凸錐包absolutely convex hull 絕對凸包convex hull property 凸麪被覆;凸多邊形特性Finding the convex hull 尋找凸包 返回 convex hull