This makes sense : in those areas with a high level of radiation , living things would tend to die or sicken and fail to reproduce .

这说明了：在那些高辐射地区，生物更易死亡或患病并且更易不育。

Surveys since then suggest that the dramatic fall in the number of americans who sicken or die during heatwaves is a direct result of widening air-conditioner ownership , from 68 % of american households in 1993 to nearly 90 % today .

自那以后的调查表明，美国家庭空调的拥有率从93年的68%上升到了今天的近90%，这一数字的增长直接带来了酷暑期因炎热患病、死亡人数的大幅下降。

He worries that radiation exposure could sicken his son .

他担心辐射暴露可能让儿子生病。

The coastal population began to sicken .

沿海的索马里人开始生病。

Confirming that the virus is very old also helps explain why it infects almost all african monkeys but does not sicken them .

确认这种病毒很古老也可以解释为什么它感染了非洲所有的猴子却没有让它们生病。