在Xapian系统内，可以更为明确地指定查询结构，比如，可以指定想要的是组合单词，还是不同的单词和其他结构。
Within the Xapian system, you can be more specific with your query structure, specifying that you want words together, or different words, and other structures.
不过，您同样可以将所有的思想应用到任意的机器体系结构、操作系统和编译器组合。
However, you can apply the overall concepts equally well to any machine architecture, operating system, and compiler combinations.
脱氧核糖核酸也拥有这种组合系统，你的生物基础或氨基酸数量是有限的，但却能组合出，几乎无限的脱氧核糖核酸螺旋结构。
DNA also has this sort of combinatorial system where you have a finite number of, I guess, bases or amino acids that could combine to a possible infinity of strings of DNA strings.
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