A proxy is important to an Ajax architecture if you plan to aggregate content from multiple Web services or if you need to enforce a security mechanism on clients connecting to the network.
若想聚合来自多个Web服务的内容或需要在连接到网络的那些客户机上强制施行一种安全机制，那么代理对于Ajax架构而言就愈发重要。
For instance, the subject topic for security can both classify content about security and describe security within the Web site or help system content. Figure 5 illustrates this scenario.
例如，Security的主题题目既可以对安全性的内容进行分类，又可以描述Web站点或帮助系统内容中的安全性。
Goodger referred to this as a "jail cell for web content", preventing people from exploiting security issues in the browser.
Goodger称这好比给网页内容开设了单独牢房，让用户从浏览器的安全问题中解放出来。
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