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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Metal Polish - Mix several crushed onion slices with some water. Apply the solution to a dull metal object using a piece of cloth.

擦亮金属——将一些压碎的洋葱片和水混合，用块布蘸取溶液，擦拭暗淡的金属物品。

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Note Finish creating, deleting, and updating all your objects before you begin to archive them. Your archive will be corrupted if you mix archiving with object modification.

在归档之前，结束创建、删除和修改所有对象。如果把归档和对象修改混合，则归档文件将会被废弃。

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