注意，这个例子为每个timeseries列创建一个单独的虚表。

Notice that the example creates a separate virtual table for each TimeSeries column.

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现在，我们要访问的虚表的第二个成员。

Now we want to access second member of the virtual table.

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这里一半的马只是徒有虚表。

Half these horses are just show ponies.

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这里一半的马只是徒有虚表。

Half these horses are just show ponies.

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