如果允许日志记录和异常处理类有多个实例则会更好。
It would have been better to allow multiple instances of logging and exception-handling classes.
但是，可以指定- 1，这允许无限的活跃日志空间。
You can, however, specify the value to be -1, which allows infinite active log space.
日志允许您回顾历史，查看是否有错误发生并在问题发生时获取有关问题的更多细节。
Logs let you look back in time to see whether errors occurred and get more details about problems as they occur.
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