如果想通过用户最近阅读的100篇文章分析其趋势或者实现对它们的查询，那么这个功能就很有用了。
You might want to analyze the last 100 items a user has read to pull out trends or enable complete search and this function may therefore be useful.
所有这些都是适当的性能优化方法中的一部分，有效地捕获数据，并正确地分析其结果和趋势。
This is all part of appropriate performance tuning methodology; capturing data effectively and properly analyzing the results and the trends.
这些标志可帮助您动态地收集信息，但我不会依赖其确定历史趋势和进行分析。
These can help you gather information on the fly, but I wouldn't rely on them for historical trending and analysis.
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