The upper slope was characterized by all kinds of sliding sediments and lower slope by all kinds of debris flow sediments. 其中，上斜坡以各種規模的滑動(dòng)沈積為特色，下料坡以不同性質(zhì)的碎屑流沈積為特徵。
As bad as the pyroclastic flows are, the ash injected into the atmosphere can have even more far-reaching consequences. 如同火山碎屑流般兇惡，噴發(fā)進(jìn)入大氣層的火山灰甚至會(huì )造成更深遠的影響。
Those pyroclastic flows are very hot and very fast. 那些火山灰流非常燙，速度也非?？?。
Whole towns have been wiped out by poisonous gases from volcanoes even before they were hit with pyroclastic flows or lava. 在整個(gè)村莊遭到火山灰流或熔巖的襲擊之前，為了躲避來(lái)自火山的有毒氣體，人們已經(jīng)筋疲力盡。
