不过收获很小，家长们都工作到很晚，许多都没有英语技能去加强或者帮助孩子们的作业。
The pickings were slim. Parents worked late, and many lacked the English skills to enforce or help with homework.
加强基因改造，提高作业抗旱潜能。
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.
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