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

The underlying problem is that DB2 processes recursion by essentially producing one level of recursion at a time (breadth first), while Oracle uses depth first.

在底层，DB2 处理递归时采用的方法是逐层递归（广度优先），而 Oracle 采用的是深度优先的方法。

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。

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