让我们来仔细研究该行：音调值、分隔符、时间值、分隔符、命令区域、分隔符和注释区域。

Let's dissect that line: tone values, delimiter, time values, delimiter, command area, delimiter, and comment area.

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我已经提到，我们将把在桌面的底部区域作为一个导航栏。现在，我们需要添加导航菜单项和一些分隔符。

I already mentioned that we would use the bottom area of the desk as a navigation bar. Now we need to add the navigation items and some separators.

youdao

头部区域的背景和主背景之间的对比不是很明显，因此，我们将添加一些分隔符和渐变，以更好地定义每一个部分。

There is not a lot of contrast between the header background and the main background, so we will add a few separators and gradients to define each section better.

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