单词ash fall
un.: 灰雨;炭尘沉降网络: 火山灰下降;火山落灰;降落灰
炭尘沉降
灰雨
During that time, cold winters, ashfall from volcanic eruptions, and plagues adversely affected the population several times.
在那期间,寒冷的冬天,及来自火山爆发的灰沉降层和瘟疫,几次影响了人口的增长。