五个优先措施可以使G20峰会在改善全球食物安全长效机制上发挥关键作用。
Five priorities may give this G20 summit a vital role in improving long-term global food security.
控制在押人员动态，预防各类事故的发生，发挥看守所监管安全长效机制，是看守所羁押管理工作的关键所在。
It is the key work of custody to control prisoners' trend, prevent the happenings of all kinds of accidents and develop protracted and effective mechanism in detention house.
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