层次索引模板通过一组常驻显存的索引缓存序列，隐式地表示地形块细节层次。

It represents terrain blocks detail levels by using an index buffer sequence, which resides in video memeory.

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您的样例应用程序仍然处于初级阶段：它知道如何提供索引页面和一些静态内容，并且有一个可用于进一步开发的良好主模板。

Your example application is still in its early stages: It knows how to serve up the index page and some static content, and it has a decent master template ready for further development.

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静态文件、模板和代码都来自磁盘，组成数据库的数据表和索引也来自磁盘。

Static files, templates, and code are served from disk, as are the data tables and indexes that make up the database.

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