We can define generic methods in one place and mix them into our Objects across multiple Class types while limiting access to sensitive methods on a per Object basis.

我们可以在一个地方定义通用的方法，然后将它们混入跨越多个类类型的对象，同时限制对每个对象为基础的敏感方法的访问。

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Decorators do not currently let you modify class instantiation per se, but they can massage the methods that are attached to the class.

decorator目前并不允许您修改类实例化本身，但是它们可以修改依附于类的方法。

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