Hierarchical data structures map very well into documents.

分层数据结构可很好地映射为文档。

youdao

All programmers are fluent in these algorithms, including such things as recursion, hierarchical data structures, and multithreading.

所有的程序员都熟悉这些算法，包括递归、层次数据结构和多线程等。

youdao

Relational databases are, by their nature, more flexible than hierarchical data storage structures such as XML.

就其性质而言，关系数据库比层次数据存储结构(如xml)更灵活。

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