求翻译：由于模拟仿真系统中涉及到的实体和实体的属性较多，但同一时刻发生作用的只有少量的实体，所以模拟仿真系统的建模采用面向对象的方法比用网络图的方法更加有效。是什么意思？

Only a small number of entities, entities and entity attributes are more involved in the simulation system, but the same time the role of simulation modeling using object-oriented approach is more effective than the method of the network diagram.

The simulation system of entities involved in the entity's properties and more, but at the same time there are only a very small number of works in the entity, the simulation system modeling in an object-oriented way than by using the diagram of the network more effectively.

Because in the simulation simulation system involves the entity and the entity attribute are many, but identical time react only then few entities, therefore the simulation simulation system modelling uses the object-oriented method to use the network chart the method to be more effective than.

Because entities and entities involved in the simulation system of more properties, but the same moment when only a small number of entities, simulation system modeling using object-oriented approach than network more effectively.

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