volcanic eruption

The volcanic eruption ejected ash into the stratosphere, temporarily reducing global temperatures by a measurable degree.火山喷发将灰烬喷射到平流层中，使全球气温暂时降低了可测量的程度。

Advance warning systems have significantly reduced casualties from volcanic eruptions in densely populated regions.提前预警系统显著减少了人口稠密地区因火山喷发而造成的伤亡。