Some notations are a bit outdated and it is mostly an introduction to real analysis that may be a bit too much as a first book.
有些注释有点过时，而且作为第一本书，对实分析的介绍可能有点过多了。
I hope the above examples and analysis prove to be be helpful and serve as an introduction to SQL query tuning.
我希望上面的示例和分析证明是对您有所帮助的，并希望本文能充当SQL查询调优的简介。
This is a thorough introduction to the conventional practice of systems analysis and design.
这是彻底的系统分析和系统设计的传统的实践的介绍。
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