复选框字段是这种应用的典型例子：这些字段通常不包含在POST提交中，除非用户明确选中它们。
Checkbox fields are a good example of this: These fields are typically not included in the POST submission unless the user explicitly checks them.
从SourceForge下载的AjaxTags演示应用程序包含很多实际例子。
The AjaxTags demo application downloaded from SourceForge has numerous real world examples.
一个好的例子就是组合应用中包含密集型计算的部分可以被并行运行，这会减少整体处理时间。
A good example is where a part of the composite application contains an intensive calculation that can be run in parallel to reduce the overall processing time.
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