The first three lines of code check out the latest version of sqlalchemy and add it as a package to the Python installation on your local system.
前三行代码检查最新版本的 sqlalchemy，并将它作为包添加到您本地系统的 Python 安装中。
I'll just stick to the old simple UNIX command-line version of cron, and you can check with your system administrator to see how you can implement it in your Web application.
我只讨论老式简单的cron的UNIX命令行版本，您可以向系统管理员咨询如何在自己的Web应用程序中实现它。
AIX 5l Version 5.3 enhanced the implementation of the helper, which specifically performs the file system check for JFS2 file systems.
AIX 5l Version 5.3增强了Helper的实现，它专门为JFS2文件系统执行文件系统检查。
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