The notion of a visitor chain provides a very flexible framework with many options for how you structure and reuse the visitors on the tree.
访问者链接的概念为在树中构造和重用访问者提供了一种具有丰富选项的灵活框架。
EmptyVisitor just provides an empty implementation of all the various types of visitors, allowing you to subclass and override only the visitor methods of interest.
EmptyVisitor只是提供了所有不同种类的visitor的空的实现，允许您只对感兴趣的visitor方法建子类和重写。
The author comes up corresponding conclusion at the end and provides some beneficial Suggestions on visitor management of China's tourism attractions.
最后通过分析得出相应的结论，进而为我国景区的游客管理提供一些有益参考。
The foyer provides not only the functional areas like wardrobe, sanitary rooms and bar, but also leads the visitor excitingly around the auditorium into the inner concert hall.
门厅不仅是存包处、卫生间、酒吧等功能空间，还起到引导游客从喧闹的礼堂到达内部音乐演奏厅的作用。
Finally, the research provides some advices that are beneficial to affect visitor perception of crowding in the Summer Palace.
最后，对研究进行总结，并根据总结提出了利于颐和园影响游客拥挤感知的建议。
Finally, the research provides some advices that are beneficial to affect visitor perception of crowding in the Summer Palace.
最后，对研究进行总结，并根据总结提出了利于颐和园影响游客拥挤感知的建议。
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