通过在屏幕上显示第一菜单及其上级菜单中各功能项的图标，实现了不同层级菜单显示的连续性。
Through the display of the ICONS of the functional items in the first menu and the superior menus of the first menu, the continuity of the display of the menus in different hierarchies is realized.
通过在屏幕上显示第一菜单及其上级菜单中各功能项的图标，实现了不同层级菜单显示的连续性。
Through the display of the ICONS of the functional items in the first menu and the superior menus of the first menu, the continuity of the display of the menus in different hierarchies is realized.
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