Three modes of a camera control, planned navigation, manual navigation, guided navigation, are implemented.
同时实现了虚拟相机控制的三种方式：计划漫游、手动漫游、引导漫游。
A navigation manual plays a significant role in popularizing the application of educational software through providing the user an easy access to effective use of the educational software.
导航文档能够为用户更好地使用教育软件提供一个有效的途径，从而对教育软件的推广应用有着积极作用。
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