CARDF(见图5中1)：表基数，表示表中总行数。

CARDF (see number 1 in Figure 5) : table cardinality, which denotes the total number of rows in the table.

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count函数非常有用，可以在任何级别显示汇总表中的每个汇总行由多少条记录组成。

The COUNT function is very useful to show at any level how many records make up each aggregated row in the summary table.

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在21天的行程中，这列火车穿越中国、哈萨克斯坦、俄罗斯、白俄罗斯、波兰、德国、法国和西班牙，总行驶路程超过8，000英里，创造了一项新纪录。

And after spending 21 days covering more than 8,000 miles through China, Kazakhstan, Russia, Belarus, Poland, Germany, France and Spain, it did set a distance record.

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在21天的行程中，这列火车穿越中国、哈萨克斯坦、俄罗斯、白俄罗斯、波兰、德国、法国和西班牙，总行驶路程超过8，000英里，创造了一项新纪录。

And after spending 21 days covering more than 8,000 miles through China, Kazakhstan, Russia, Belarus, Poland, Germany, France and Spain, it did set a distance record.

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