Generational relations have become an outstanding problem in modern society, which has made the social structure more complicated.

代际关系问题已经成为现代社会的一个突出问题，它使社会关系的纵横结构更加复杂。

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You need to take care of more complicated cases that span more than one table structure on the source by using mapping groups.

你需要关注更多复杂的情形，它们使用映射组来存放更多的表结构。

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NIS+ also extended the naming system so that databases were placed into a tree structure rather than a single domain, allowing for much more complicated and wider-ranging distribution.

NIS+ 还对命名系统进行了扩展，因此数据库将放入树形结构中（而不是单个域中），以便允许更为复杂、范围更广的分布。

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Biological drugs, which have a complex structure, are far more complicated to produce than regular chemical drugs, which have a single molecular structure.

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And nothing is more so than the most complicated structure we know of in the universe, the human brain.

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Don Berwick, former administrator of the US Centers for Medicare and Medicaid Services, says the challenge ahead is much more complicated than merely tweaking Medicare's funding structure.

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