在颠倒的域名之后，需要使用单一单词的子包名。
After the reversed domain name, use only single-word subpackage names.
大部分搜索引擎使用一种倒排索引——不是针对每个单一的单词，为每个单一的网页及其上面的所有单词都编排一个目录，而是为每个单词出现的位置编排一个目录。
Most search engines use an inverted index — rather than compiling a list of every single Web page and all its words, for every single word, they compile a list of the places where it appears.
域名长度，短和可爱的域名是最好的。单一得、可识别的词优于多个单词。
Short and sweet is generally best. Single, recognizable words are considered better than multiple words.
域名长度，短和可爱的域名是最好的。单一得、可识别的词优于多个单词。
Short and sweet is generally best. Single, recognizable words are considered better than multiple words.
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