Shut down systems when only 15-minute E-mail checks are active, or when a streaming audio connection is left playing in mute for hours.
当计算机中只有历时15分钟的电子邮件检查处于活动状态时，或者如果流音频连接在几个小时内一直处于静音播放状态，则关闭系统。
Although Cron has serious problems on a system that is shut down regularly, it is still the tool of choice for jobs that run frequently, such as hourly checks for new E-mail on a remote mail server.
尽管对于经常关闭的系统来说，Cron会造成一些严重的问题，但是，对于经常运行的作业，比如远程邮件服务器上每小时进行一次的新邮件检查，Cron仍然是一个重要的工具。
Martin responded in an e-mail to university officials: “This moron has shut down a program that would have brought Connecticut millions of foreign dollars.”
马丁对此做出了回应，他向该校职员发了一封电邮，声称“（马尔文）那个笨蛋禁止了我的项目，这也让康州大学损失了数百万美元的收入。”
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