On a piece of paper, look at each column formula and write down the field(s) referenced in the formulas.

查看每一个列公式，在一张纸上写下公式中引用的一个或多个字段。

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Note that if your documents have multiple categories selected, you need to use additional code in the view column formula to ensure that all categories are displayed and can be looked up.

注意，如果文档选择了多个类别，那么需要在视图列公式中使用附加代码来确保所有类别都被显示，并且能够被查找。

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In fact, in a column for Morningstar.com last year, Greenblatt said picking and choosing from Magic Formula-approved stocks can be dangerous.

FORBES: Five Stocks Including Herbalife That Greenblatt's Magic Formula Should Love