On Windows, you specify the home directory by setting an environment variable or by setting a registry entry.
在Windows 上，通过设置环境变量或通过设置注册表项来指定主目录。
You can do this by setting an environment variable named PYTHONSTARTUP to the name of a file containing your start-up commands.
你可以设定一个名为pythonstartup的环境变量指向包含以上命令的文件名来做这些工作。
You may either set OPTCOMPIND either as an environment variable or as a parameter in the configuration file, but setting it as a parameter will take precedence on execution.
您可以将OPTCOMPIND设置为环境变量，也可以设置为配置文件中的参数，但是，将之设置为参数将优先执行。
When we "export" an environment variable under bash, any subsequent program that we run can read our setting, whether it is a shell script or not.
当在bash中“导出”环境变量时，以后运行的任何程序，不管是不是shell脚本，都可以读取设置。
Instead of specifying the configuration setting directly, the configuration points to an environment variable, which in turn contains the configuration value.
配置不直接指定配置设置，而是指向环境变量，环境变量又包含配置值。
Instead of specifying the configuration setting directly, the configuration points to an environment variable, which in turn contains the configuration value.
配置不直接指定配置设置，而是指向环境变量，环境变量又包含配置值。
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