这里有一个难点，就是创建不同对象间的关系。
The one challenge is creating relationships between the different objects.
我们的观点是，仅当需要在不同对象间实现同一个行为而又无法使用继承时，才使用认担动作。
Our view is that you should only use contributed actions where you have a behaviour that you want implemented across multiple types of object that can't inherit it.
我们的观点是，仅当需要在不同对象间实现同一个行为而又无法使用继承时，才使用认担动作。
Our view is that you should only use contributed actions where you have a behaviour that you want implemented across multiple types of object that can't inherit it.
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