在这种情况下，它的“组合拳”，为组合日志格式的默认定义。

In this case it's "combined", a definition for the default combined log format.

youdao

不过，该日志通常称为sa日志，是标准的web日志格式(NCS A组合日志格式)，并且其他大多数工具很容易读取。

However the logs, commonly called SA logs, are in a standard web log format, (NCSA Combined log format) and are easily readable by other major tools.

youdao

组合的结果是将日志级别和用户指定的格式字符串包含在一个字符串中。

The result is a single string that incorporates the log level and user-specified format string as a single string.

youdao