在业务层，我们已有BusinessLayerProxy，它实现了IBusinessLayer接口并充当了整个业务层的管理者或控制器(如图4所示)。

In the business layer we already have a BusinessLayerProxy, which realizes the IBusinessLayer interface and ACTS as a manager or controller for the entire business layer (see Figure 4).

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在业务层，我们已有BusinessLayerProxy，它实现了IBusinessLayer接口并充当了整个业务层的管理者或控制器(如图4所示)。

In the business layer we already have a BusinessLayerProxy, which realizes the IBusinessLayer interface and ACTS as a manager or controller for the entire business layer (see Figure 4).

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