To see trends, concatenate log files and run a processing script on the combined output.

要查看趋势，连接日志文件并在合并的输出上运行后处理程序脚本。

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Combined files are a way to reduce the number of HTTP requests by combining all scripts into a single script, and similarly combining all CSS into a single stylesheet.

合并文件，通过把所有脚本置于一个脚本文件里或者把所有样式表放于一个样式表文件中，从而减少Http请求的数量。

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