In this column, I've compiled 10 must-have apps that will save you time, make your life easier and make you smile.

在这个专栏里，我会选出10款必用软件，这会节省你的时间，让你的生活更简单，也会让你高兴起来。

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Without repeating the discussion from that column, a DFA is a structure to which XPaths can be compiled efficiently.

不必重复那篇专栏文章所讨论的内容，DFA是可以高效编译XPath的结构。

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