通过模型分析得出了安全成本随安全保证程度而变化的规律。
The analysis of the model has concluded that the safety cost changes with the safety insurance degree.
ITF正在采取行动，保护海员们上岸休息的权益。ITF认为上岸休息是海员们应有的权益，同时减低了海上工作时的疲劳程度，因而保证了海事安全。
ITF is campaigning to protect seafarers' right to shore leave as essential to their rights as workers, and to minimise the effects of fatigue through work at sea and thus ensure maritime safety.
那么，聚苯乙烯泡沫塑料和聚氨酯硬质泡沫材料的阻燃机能达到何等程度才能保证整个体系的防火安全？
So, polystyrene foamed plastic and polyurethane hard foam to the flame retardant function to ensure the whole system how much the fire prevention safety?
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