2、the pivottable component (shown in figure 1-3) provides all the functionality found in excel pivottables and external data ranges.中的external data ranges如何翻译？
附录：英文原文
what are the office web components?
the office web components are a set of component object model (com) controls designed to bring interactive spreadsheet modeling, database reporting, and data visualization to a number of control containers. the owc library contains four principal components: spreadsheet, chart, pivottable, and data source. we'll discuss each of these controls briefly in this section and in much more detail in the following chapters.
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