The feed aggregator component takes several user-specified feed sources as input and then it invokes the feed reader component to get all feed items from each customized feed source.
We've finished looking at all the major tasks performed by the feed reader component; let's move on to the feed sources input component.
至此，我们已经介绍了所有主要由提要阅读器组件完成的任务；现在让我们来看看提要源输入组件。
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This is the business case for the software, and it's probably worth another article in this column (I'll let reader opinion drive that, so give me your input).