The primary reason for using an ri constraint is to ensure that data integrity is maintained whenever one table references another.

使用一个RI约束的主要原因是，确保当一个表引用另一个表时数据完整性得到维护。

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As with the previous rules, the Delete rule is implicitly created as part of an RI constraint.

和上述规则一样，Delete规则是作为一个RI约束的一部分被隐式创建的。

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Ruby supplies documentation as well as Ruby interactive (RI), an interactive documentation reader that lets you search and find information in the Ruby docs quickly.

Ruby提供了文档以及Ruby Interactive (RI)，后者是一个交互式文档阅读器，让您可以快速地在Ruby文档中搜索和查找信息。

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And Munich made sure of the three points when Freiburg's South Korean defender Du-Ri Cha scored an own goal.

CNN: Wolfsburg up to fifth place after victory

Kim Gyu-ri, who runs an image-consulting firm in Seoul, said Ms. Ri is getting mostly positive attention in South Korea, in part because she's displayed a fashion sensibility.

WSJ: South Koreans Dig for Clues About North's First Lady

Spend the final days of summer in Newport, RI, a heavenly and relaxed beach town that offers an original and altogether Americana experience.

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