Understand file permissions, access levels, and why machines talk to the domain controllers.

比如文件权限、访问控制以及电脑怎样和域控制器交互。

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Spring 2.5 adds two new annotations - @Service and @Controller - to complete the role designations for a common three-tier architecture (data access objects, services, and web controllers).

在此基础上，Spring2.5又加入了两个新的注解 —— @Service和@Controller 来完成为通常的三层架构（数据访问对象、服务、web控制器）角色委任。

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Controllers frequently need to access incoming data, such as query string values, form values, and parameters parsed from the incoming URL by the routing system.

控制器经常需要访问输入数据，如查询字串值、表单值、以及通过路由系统从输入url解析所得到的参数。

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The fact is, they can now play Batman: Arkham City on their Wii U while still having access to all their old games, controllers, and so forth.

FORBES: Nintendo Wii U CPU And GPU Clock Speeds Revealed