树端，读音shù duān，汉语词语，意思为树梢。
编写客户机端代码以遍历在运行时生成的解析树并对其求值。
Write client-side code to walk and evaluate the parse tree that's produced at runtime.
您需要为树定义一个新内容类型，这样Dojo客户端就可以区分和显示不同小部件上的数据，如清单15所示。
You need to define a new content type for the tree so Dojo clients can differentiate and render the data on different widgets, as shown in Listing 15.
客户端可以将树的原始视图作为控件视图或内容视图进行筛选。
Clients can filter the raw view of the tree as a control view or a content view.
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