You can also make the leaf pages hidden from navigation by using cross-page wires to activate the pages and establish context.
通过使用跨页面连接激活页面并建立上下文，可以在导航时隐藏叶页面。
When the page contains a control that does cross-page Posting, a new hidden field named __previouspage is created. The field contains information about the Posting page.
当含有可以cross - page posting的控件时，页面会创建一个name为__previouspage的隐藏域，此域包含了提交页的信息。
Hidden dangers to safe operation of pipelines will result from changes of riverbed in the waters where pipelines underwater cross.
管道水下穿越所通过的水域由于河床的变化而给管道的安全运行带来隐患。
应用推荐