Vendors don't do it right, don't care for it, or delegate the responsibility for it to the developers.
Vendors没有将它改正，也没有在乎它，或者将这个责任委托给开发人员。
Any time you need to configure the communication between classes and you desire less coupling than you get from interfaces, a delegate is the right choice.
任何时候，当你需要配置类之间通信的时候，当你渴望得到比接口具有更低耦合性的时候，委托都是正确的选择。
Delegate smartly, choosing the right person for each task.
明智的分派工作，选择合适的人从事合适的工作。
Delegate smartly, choosing the right person for each task.
明智的分派工作，选择合适的人从事合适的工作。
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