These two steps repeat recursively and depth first.

这两步递归地以深度优先的方式重复。

youdao

As you can see, the file traversal is depth first but not necessarily in any alphabetical order within a directory.

正如您所见到的，该文件是深度优先遍历，但不一定在任何目录内按字母顺序来进行。

youdao

SEARCH DEPTH first must be specified if all child data (over all levels) must be returned first before returning the data of the next parent.

如果必须在返回下一个父数据的数据之前返回所有的子数据(所有级别上)，则必须指定SEARCH DEPTH FIRST。

youdao

To be systematic, I'm going to build this tree depth-first left-first.

为了保持系统性，我将要把这棵树设置,为深度优先和左边优先。

麻省理工公开课 - 计算机科学及编程导论课程节选

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