It should be clear that cascading menus should only be employed in sophisticated sovereign applications for rarely used functions or as a secondary command vector for something more directly provided in the interface.

• 还要注意，级联菜单应该仅限于复杂的独占式应用中，包含那些较少使用的功能，或者是为界面上需要较为直接访问的对象提供一个命令途径。