轻、重污染区致死病的方面的差别可能是一氧化碳浓度以外的许多因素所造成的。

Differences in case fatality between high and low pollution areas could be due to many factors other than co concentrations.

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在经过一系列测评后，人们发现在预防某些突发性心脏病致死时，心律转变器比药物治疗更有效。

After a series of trials they have been found to be more effective at preventing some forms of sudden cardiac death than drug treatments are.

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出乎意料的是，人类非洲昏睡病，尽管致死率100%，且控制措施不完善，却也可能在不久的将来被消除。

Against all expectations, human African sleeping sickness, a disease with a 100% mortality rate and imperfect control tools, also looks slated for elimination in the near future.

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