English Dictionary

preorder

adj

(computing theory, of a traversal of a tree) Such that, recursively, the root is visited before the left and right subtrees.

The preorder traversal of a binary tree visits the root node, then the left subtree, and finally the right subtree.

意味（1）

(computing theory, of a traversal of a tree) Such that, recursively, the root is visited before the left and right subtrees.

Now, the preorder traversal of a tree can be constructed from the preorder traversals of the subtrees rooted at the children of the root of the tree.