同时具有文本和数字因子时，设计实际上没有真正的中心。
When you have both text and numeric factors, there really is no true center to the design.
由于该公式会扩展到整个列，因此生成的字符串依赖于每个行中的文本和数字值。
Because the formula extends for the entire column, the resulting string depends on the text and number value in each row.
就本文而言，所有的文本和数字都指向c： \ og 61中的ObjectGrid目录。
For the purpose of this article, all text and figures refer to the ObjectGrid directory in c: \ og61.
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