First, we'll create the tree viewer that will display the folder hierarchy.

首先，我们将创建显示文件夹层次结构的树查看器。

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We want to build a tree viewer that displays the hierarchy of a model.

我们的任务是，构建一个树形的查看器用以显示模型的层次结构。

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We want to build a tree viewer that displays the hierarchy of a model.

我们的任务是，构建一个树形的查看器用以显示模型的层次结构。

youdao