萨戈矿难后，联邦通过法规，加强了对作业段和密封段内空气质量的监测，以避免甲烷聚集。
Federal regulations passed after the Sago disaster increased the monitoring of air quality in active and sealed sections of the mines to avoid methane build up.
于是我们提供了每一段课程的录像，这样每个人可以保持进度并完成作业。
We provided access to recordings of each session so everyone could stay caught-up and do the assignments.
将Anacron配置为在系统启动时运行后，应当对日志文件和由anacron作业管理的其他特性进行一段时间的观察。
After you configure Anacron to run at system startup, you should keep an eye on log files and other features managed by your Anacron jobs for a few days.
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