它可以避免其他漫游系统输入设备如鼠标的不真性，提高人在虚拟环境中的沉浸感。

It can avoid the unrealistic of other input devices in virtual wandering system, such as mouse and it can enhance the human feeling of immersion in the virtual environment.

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在计算机系统环境中，物理标记的一个问题是必须为系统的每个客户机提供某类输入设备。

In the context of computer systems, one problem with physical tokens is that some sort of input device is necessary for every client to the system.

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请注意，虽然对于桌面系统来说，输入并搜索的方法要快于链接导航，但对于移动设备来说并非如此。

Note that, although the input and search method might be quicker than link navigation with a desktop system, this is often not the case for mobile devices.

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