Each strategy interface above has an important responsibility in the overall framework.
上述每个策略接口在总体框架中有一个重要的职责。
The first pattern is the strategy pattern, demonstrated by the MessageHandler interface.
第一种模式是strategy 模式，MessageHandler 接口采用的就是这种模式。
The first pattern is the strategy pattern, demonstrated by the MessageHandler interface.
第一种模式是strategy 模式，MessageHandler 接口采用的就是这种模式。
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