采购表单使用到了先前还未用过的输入控件，即文本框。
The procurement form USES another previously unused input control, the text box.
对于这些节点，希望显示文本而不是提供输入数据的机会，所以 xforms:output 控件是自然的选择。
You're interested in simply displaying text rather than providing any opportunity for data input for these nodes, so the xforms:output control is a natural choice.
清单10中的代码将把Flex应用程序中的文本输入控件设为不可见。
The code in Listing 10 sets the text input control in the Flex application to be invisible.
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