=IF(AND(D14="",E14="")=TRUE,"",SUM(D14:E14)) 怎么理解

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=IF(AND(D14="",E14="")=TRUE,"",SUM(D14:E14)) 怎么理解
=IF(AND(D14="",E14="")=TRUE,"",SUM(D14:E14)) 怎么理解

=IF(AND(D14="",E14="")=TRUE,"",SUM(D14:E14)) 怎么理解
如果单元格D14和E14都是空值,则等于空值,否则等于D14和E14的和