This article chose the online class system development example, introduced how applies UML design and develop a software model.
通过网上选课系统开发实例，介绍了如何应用uml的方法，设计和开发一个软件模型。
The realization theory and access mechanism of the method in passive role-based access control are elaborated by an information system development example.
文中结合信息系统开发实例，详细介绍了该方法在被动式的基于角色访问控制中的实现原理及其使用方法。
For example, social contact can boost the development of the brain and immune system, leading to better health and less chance of depression later in life.
例如，社交可以促进大脑和免疫系统的发育，使人体更健康，并在以后的生活中降低负面情绪出现的几率。
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