由于采用了合理的防治措施，在赞比亚，疟疾死亡率下降了60%，卢旺达和桑吉·巴尔的儿童死亡率减少了一半。

In Zambia malaria deaths have fallen by over 60% and in Rwanda and Zanzibar childhood mortality has been halved since the introduction of proper control measures.

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一些科学家担心北冰洋的冰面会成螺旋式下降，进入“死亡螺旋”- - - - -即使我们成功减少碳排放量，也无法改变现在的情况。

Some scientists worry that Arctic sea ice may be going from a downward spiral to a "death spiral," one from which there is no escape even if we can manage to reduce carbon emissions.

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培训项目和安全状况的改善可能确实对减少死亡有所贡献，但劳工统计局报告表明，2009年美国人的工作总时数在下降了6%。

Though training programs and other safety improvements may have contributed to the decline, BLS reported that the total hours worked by Americans declined by 6 percent in 2009.

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