hierarchical menu

1. The appellation stuck, and the age of the sequential hierarchical menu began.
   其名称也从中而来，于是顺序层次关系菜单时代开始了。
2. The SiteMapPath is useful for sites that have deep hierarchical page structures, but where a treeview or menu control might require too much space on a page.
   对于具有较深的分层页结构的站点，sitemappath很有用，但在这种站点内，treeview或menu控件可能需要占用页上的许多空间。

noun

1. a secondary menu that appears while you are holding the cursor over an item on the primary menu

   Synonym:    cascading menusubmenu