anonymous function and closure
匿名函数和闭包
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A Groovy Closure is an anonymous function that can access its enclosing scope, can be called repeatedly at will, and be passed around as it were data.
一个Groovy闭包是一个匿名函数，它可访问包含它的范围，可随意被重复调用，并可将其当作数据到处传递。
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