关闭子菜单并返回上一级菜单或子菜单。
Close ea submenu and return to the previous menu or submenu.
集合的第一个样式对应于第一级菜单的菜单项样式。
The first style in the collection corresponds to the style of menu items in the first level of the menu.
长按主屏可以展开一级菜单，你可以在主屏上增加不同的快捷方式。
Tapping and holding on the home screen will expose a menu that lets you add different shortcuts to your home screen.
而退出选项只能将其带回到上一级菜单，这就意味着通过菜单树导航是一件真正繁琐的事。
Then, the Exit option would take him up only one level in the hierarchy. This meant that navigating through the menu tree was a real chore.
图12显示以上CSS应用于第一级UL元素所产生的菜单效果。
Figure 12 shows what the menu looks like with the first level UL element styled using the CSS above.
为了实现子菜单，我们嵌入另一级UL元素。
To achieve sub-menus, we embedded another level of UL elements.
word的大纲视图允许用户取消单独的标题，而writer的浏览栏仅仅提供给你隐藏某一级别以下菜单的选择；
Word's Outline view allows users to conceal individual headings, while Writer's Navigator only gives you the option of hiding headings beneath a certain level.
这里菜单只有一级，层次关系扁平化了。
The hierarchy of menus has been flattened down until it is only one level deep .
这里菜单只有一级，层次关系扁平化了。
The hierarchy of menus has been flattened down until it is only one level deep .
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