Navigation goes from one page to the next, not from one frame to the next, so links go to the next outer page.
导航从一个页面进入下一页面，而不是从一框架到另一框架，因此链接进入下一个外部页面。
If navigation was not from one outer page to the next, you would need to synchronize the body content with the proper left navigation frame as users browse the site.
如果导航不是从一个外部页面到下一个外部页面，那么当用户浏览网站时，您就需要用适当的左侧导航框架与正文内容同步。
Using tiles to define the page layout results in the use of JSP components for the outer pages, giving flexibility to later choose whether the content is static or dynamic.
使用tile定义页面布局可以在外部页面中使用JSP组件，提供了以后选择内容是静态还是动态的灵活性。
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