It provides the basis for dealing with the on-disk file system, as it defines the file system's managing parameters (for example, total number of blocks, free blocks, root index node).
它是处理磁盘上的文件系统的基础，因为它定义文件系统的管理参数(例如，块的总数、空闲块和根索引节点)。
While Knuth has justly warned that "premature optimization is the root of all evil," the whole point of an index is to find information fast, so this column addresses performance issues as well.
尽管Knuth曾经忠告我们：“不成熟的优化是问题的根源”，但索引的目的在于快速地找到信息，因此本专栏同时也将讨论性能问题。
An index page at the root of the site acts as the main page of the Web site, a downloads area, and an area for administrators (hereafter called admin).
把站点根目录下的索引页作为 Web 站点、下载区域以及管理员区域的主页面。
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