Merge commit '89de52f27cded4f3c831525bae0842de2de6bb91' into ja

en/12.1.md

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 # 12.1 Logs
 
-We look forward to developing Web applications able to run the entire program of various events occurring during record each, Go language provides a simple log package, we use the package can easily achieve logging features, these log are based on the combined package fmt print function like panic for general printing, throwing error handling. Go current standard package only contains a simple function, if we want our application log to a file, and then to combine log achieve a lot of complex functions( written a Java or C++, the reader should have used log4j and log4cpp like logging tool ), you can use third-party developers a logging system, `https://github.com/cihub/seelog`, which implements a very powerful logging functions. Next, we describe how the system through the log to achieve our application log function.
+We want to build web applications that can keep track of events which have occurred throughout execution, combining them all into one place for easy access later on, when we inevitably need to perform debugging or optimization tasks. Go provides a simple `log` package which we can use to help us implement simple logging functionality. Logs can be printed using Go's `fmt` package, called inside error handling functions for general error logging. Go's standard package only contains basic functionality for logging, however. There are many third party logging tools that we can use to supplement it if your needs are more sophisticated (tools similar to log4j and log4cpp, if you've ever had to deal with logging in Java or C++). A popular and fully featured, open-source logging tool in Go is the [seelog](https://github.com/cihub/seelog) logging framework. Let's take a look at how we can use `seelog` to perform logging in our Go applications.  
 
 ## Seelog Introduction