A wall of ash and debris hundreds of kilometers thick... 一道粉尘和碎片组成的墙 厚达数百公里
Left by the volcanoes' ash, 由火山灰形成
In minutes, fire turns grassland to ash. 几分钟内 大火就将草原化为灰烬
The island's barren slopes of volcanic ash and lava 一个充满了火山灰和火山岩的不毛之地