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.
本文对乘务作业段的定义与划分、时间耗费的计算及整个排班计算的实现过程进行了详细阐述。
Defining and cutting of work-pieces, calculation of time costs and the process of total scheduling are detailed.
一段来自秘鲁莫切的12岁男孩在路灯下的人行道上做作业的视频在被当地警方分享后，在脸书上被观看了数百万次。
A video showing a 12-year-old boy from Moche, Peru, doing his homework on the sidewalk, under a streetlight, has been watched several million times on Facebook after being shared by local police.
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