程序标签栏显示了系统内所安装软件的启动项。

The applications TAB displays launchers for the software installed on the system.

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最后，我们得到了主要代码，显示实际标签栏和其中的按钮。

Finally, we get to the meat of the code which is displaying the actually TAB bar and the buttons inside.

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“前进”和“后退”按钮也挪到了标签栏，就是窗口的左上角。

The forward and back buttons are moved into the TAB bar, placing them in the top-left corner of the window.

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