GNOME Panel:
GNOME Panel is a highly configurable launcher and taskbar for GNOME. It formed a core part of the GNOME desktop in versions 1.x and 2.x. It has been replaced in GNOME 3.x by default with GNOME Shell, which only works with the Mutter window manager.
en.wikipedia.org
GNOME Panel:
GNOME Panel，是GNOME桌面环境下的用户界面程序，提供应用程序启动器与任务栏。
zh.wikipedia.org
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GNOME PanelGNOME Panel