然而，关于异常处理和并发机制的章节，作为高级主题仍然是有效的。

However, the sections on exception handling and concurrency mechanisms are still valid as advanced topics.

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W3chools上的SQL教程是一个非常有用的初学者教程，可以将它作为高级的SQL参考资料。

The W3chools section on SQL is useful as a beginner's tutorial and as an advanced reference point for SQL.

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修改包括改变Classic Registry的用户接口，以便它同时也可以作为高级搜索功能的接口。

In addition, these modifications include changing the user interface of the Classic Registry so that it can serve as the user interface for the advanced search function also.

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