accountnumber列是按照满足以下条件的任意约定来验证的，即以三到五个字母开始，后跟五个数字，然后是一个破折号，最后又是三个数字。

The AccountNumber column is validated against an arbitrary convention that begins with three to five letters followed by five Numbers, then a dash, and finally three more Numbers.

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为此，可以使用cd dashback，即cd后面跟一个破折号(cd -)。

To do that, use the CD dashback. That's CD followed by a dash (CD -).

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