For example, use of portlets that invoke Web services at the user interface level and the implications on the functioning of that layer.
例如，在用户接口级别上调用Web服务的portlet的使用，以及在此层机能上的含意。
The Software as a Service (SaaS) level provides an environment for the end-user to access an application and use it.
SoftwareasaService (SaaS)层为最终用户提供了访问和使用应用程序的环境。
This scheme use different authentication mechanism to authenticate users of different level to ensure the mobility and security of user account.
该方案对于不同权限级别的用户，采用分级的身份鉴别技术，充分保证了账户的移动性和访问的安全性。
Rather than exposing the entire file system to the user, the Finder hides any files and directories that an average user should not need to use, such as the contents of low-level UNIX directories.
相较于把整个文件系统展示给用户，Finder应用隐藏了那些普通用户不需要使用的文件和目录，比如底层的UNIX目录中的内容。
Rather than exposing the entire file system to the user, the Finder hides any files and directories that an average user should not need to use, such as the contents of low-level UNIX directories.
相较于把整个文件系统展示给用户，Finder应用隐藏了那些普通用户不需要使用的文件和目录，比如底层的UNIX目录中的内容。
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