我见过的许多基于CSS的导航标签大都具有一类的特征：矩形的色块，也许仅仅是一个轮廓，对于当前选中的标签则没有边框，标签在鼠标指针游至其上时改变颜色。
Many of the CSS-based tabs I've seen suffer from the same generic features: blocky rectangles of color, maybe an outline, a border disappears for the current TAB, a color changes for the hover state.
例如，选择单选按钮时亮灯。如果和软件进行适当集成，即使是刻度盘上的指针位置也能够提供导航信息。
Car radio buttons that, for example, light when selected, even a needle's position on a dial, can provide navigational information if integrated appropriately with the software.
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