不用说，如果删除了导航标志，它们就不能辅助导航了，所以最好使其永久地固定在界面上。
Needless to say, signposts can't aid navigation if they are removed, so it is best if they are permanent fixtures of the interface.
在设备中，对屏幕也有同样的规则，但硬件控件本身能够起到导航标志的作用——当它们能够提供状态的视觉或者触觉反馈时更是如此。
In devices, similar rules apply to screens, but hardware controls themselves can take on the role of signposts-even more so when they are able to offer visual or tactile feedback about their state.
禁止损坏助航标志和导航设施。
It shall be forbidden to damage navigation AIDS or navigational facilities.
禁止损坏助航标志和导航设施。
It shall be forbidden to damage navigation AIDS or navigational facilities.
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