这段代码可以引用块中定义的局部变量、闭包的参数以及创建闭包的作用域中的变量。

This code can refer to local variables defined within the block, arguments to the closure, or variables from the scope in which the closure is created.

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然后，在规则的结果块使用该引用，将测试分配给Machine对象。

This reference is then used in the consequence part of the rule to assign tests to the Machine object.

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Groovy还实现了方便的默认行为，为名为it的迭代自动提供参数，您可以在代码块中引用。

Groovy also implements the handy default behavior of automatically supplying a parameter for your iteration named it, which you can reference within the code block.

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