Pattern Languages of Program Disign 程序设计模式语言·卷
A delegate object or delegation is a simple and powerful pattern in which one object in a program ACTS on behalf of, or in coordination with, another object.
委托对象或者说委托方法是一个简单且功能强大的模式，在此模式中，程序中的一个对象，其行为代表另一对象，或与其一致。
It is a formal pattern that a specific program looks for in text or a string of characters using a recognition process called pattern matching.
它是一种形式模式，一个特定程序使用名为模式匹配的识别流程在文本或字符串中进行查找。
The basic pattern of the program is unchanged.
程序的基本格局无需改动。
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