输入包括一系列的约束定义。

The input consists of a sequence of constraint specifications.

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DrySQL会提取表格中的约束定义，并用它们自动生成模型类的关联。

DrySQL retrieves your table's constraint definitions, and USES them to automatically generate associations for your model class.

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对于第二个策略(每个类层次结构一个表)，您必须用检测约束定义您自己的完整性。

For our second strategy (one table per class hierarchy), you'll have to define your integrity using check constraints.

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Justice is defined as what binds the city together and makes it one.

正义被定义为,是将城市约束在一起,并使其协和的力量。

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