看看它是如何围绕整个结果集添加一个根标记的。

See how it adds a root tag around the entire result set?

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然后，将这个新创建的节点添加到根元素，即filesystem。

It then adds this newly created node to the root element, filesystem.

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要创建这种布局，我们首先添加一个其中包含两个RowDefinition的根级Grid面板。

To create this layout we'll begin by adding a root Grid panel that has two RowDefinitions within it.

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