The model manages the data of the application by applying business rules.
模型。 模型通过业务逻辑管理应用中的数据。
Figure 15: Object model after applying the Flyweight pattern.
图15：使用Flyweight后的对象模型。
We solve this problem by applying the powerful concept of a model.
为了解决这个问题，我们使用模型这种强有力的概念。
Prior to applying a gravity model, one has to calibrate the impedance function.
应用重力模型的之前，你应该先校准阻抗函数。
Prior to applying a gravity model, one has to calibrate the impedance function.
应用重力模型的之前，你应该先校准阻抗函数。
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