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。

youdao

We now have a fast, easy way to upload files from a local directory tree of any depth to a remote server.

现在我们有了一个从任意深度的本地目录树上载文件到远程服务器上的快速、方便的方法。

youdao

You can easily customize it to show the navigation in a flat list or in a tree hierarchy of varying depth.

您可以轻松对它进行自定义，以在平级列表或在具有不同深度的树层次结构中显示导航。

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

It is true, they say, that tree roots can trap sliding soil but only for shallow landslides of up to a metre in depth.

ECONOMIST: Deforestation and floods