实验证明模型有效地支持区分服务，能促进节点的资源共享，具有良好的扩展性和实用性。
Experimental results show that the model, which has good scalability and availability, can achieve service differentiation and promote resources sharing by nodes.
该房屋针对年轻家庭设计了一个高效简单的平面布局，为家庭生活提供了灵活性、可扩展性和实用性。
The house has a highly efficient simple plan that offers flexibility, growth and practicality for its young family.
重点介绍了建立这种模型所需要的类以及类所包含的主要变量和方法，同时也充分考虑了它的扩展性和实用性。
It introduces the classes needed to build the model framework, the major variables and the methods needed to constitute those classes.
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