如果我们只抽取数据元素，会得到“0,255,255”，如果您不知道数据定义是什么，那么这种数据毫无意义。

If we simply extract the data elements, we get "0, 255, 255", which is meaningless unless you know what the data definitions are.

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因此，如果抽取这些元素并将其放入公共模板，则可以从所有视图调用该模板(通过名称)。

So if these elements were extracted and put in a common template, the template can be called (by name) from all views.

youdao

当数据元素出现在我们已经从中抽取数据的数据源中的时候，我们只需要将其添加到现有的抽取代码中。

When a data element occurs in a data source from which we're already extracting data then we merely need to add it to the existing extract code.

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